| 19177 | Adelaide Hospital | TCD MS 11270/5/1-7 | c.1900-1999 | 5 - Medical Patient registers Patient deaths Case fi... | Adelaide Hospital Archive |
| 14281 | Alexandra College | | 1899-1900 | File relating to Building and Extension, 1899-1900:R... | |
| 14286 | Alexandra College | | 1900-1999 | 1 book, list of subscriptions promised to the buildi... | |
| 14305 | Alexandra College | | 1900-1935 | Material relating to Queen Alexandra, royalty letter... | |
| 13273 | Armagh County Museum | 1953/2 | 1900 | Water-colour, monochrome, 'Ballinahone, Armagh, 1900... | |
| 13274 | Armagh County Museum | 1975/35 | 1900 | Copy will of Miss Ann Bakewell, Eddowes and Sons, De... | |
| 16409 | Armagh Diocesan Archive (RC) | | 1889
1900
1919
1926 | Material relating to the Religious, includes:Folder ... | Cardinal O'Donnell Archive |
| 16444 | Armagh Diocesan Archive (RC) | | 1900 | There is a detailed calendar of Letters of His Emine... | Cardinal Logue Archive |
| 19152 | Armagh Robinson Library | Volume 1900-1909 | 1900 | An extract from the Church of Ireland Gazette on the... | Dean Rennison Papers |
| 6231 | Ballymena Central Library | | 1900-1905 | Bound typescript volume of the diary of Alice Allen ... | |
| 16215 | Birr Castle Archives | A-W | 1900 | M/30: Letters and papers regarding the marriage sett... | The Rosse Papers |
| 4490 | Brother Allen Archive | Box 166 | 1900-1922 | Mounted 'Inghinidhe na h-Éireann' lea... | Brother Allen Archival Collection |
| 24465 | Brother Allen Archive | Box 200 | 1900 | Letter from T.D. Sullivan to Miss Alice Milligan, 19... | Brother Allen Archival Collection |
| 6183 | Carlow County Archive | | 1900-1945 | Carlow Urban District Council Minute Books:5 June 19... | Carlow Urban District Council |
| 16771 | Cashel, Ferns and Ossory Diocesan Archive (CoI) | | 1883-1900 | Church of Ireland Register of Vestrymen, Tipperary, ... | Bolton Library Archive |
| 16809 | Cashel, Ferns and Ossory Diocesan Archive (CoI) | | 1900-1913 | Lismore Estate?Timber Sales, 1900-1913, 1 volume. | Bolton Library Archive |
| 14409 | Cavan County Archives | CTComm | 1829-1900 | Includes correspondence, minute books, leases, wills... | Cavan Town Commissioners |
| 6079 | Clare County Archives | | 1899-1900 | Clare County Council, Minute Book, 22 April 1899 - 1... | Clare County Council |
| 6080 | Clare County Archives | | 1900-1905 | Clare County Council Minute Book, 19 November 1900 -... | Clare County Council |
| 16960 | Clare County Archives | | 1900-1908 | Finance Book Expenditure:December 1900 - February 19... | Ennis Poor Law Union |
| 16967 | Clare County Archives | | 1900-1926 | Quarterly Minute Book:October 1900 - March 1926 | Ennis Rural District Council |
| 14387 | Clare County Archives | | 1900-1999 | Miscellaneous Collections:Miscellaneous photos depic... | Clare County Library Photographic Archive |
| 14389 | Clare County Archives | | 1900-1999 | Old Ennistymon Society Collection:Photographs of lif... | Clare County Library Photographic Archive |
| 14390 | Clare County Archives | | 1900-1950 | O'Callaghan-Westropp Collection (Clare):Photogra... | Clare County Library Photographic Archive |
| 14391 | Clare County Archives | | 1900-1950 | Pilkington, Griffin, Keane Collection:Photographs of... | Clare County Library Photographic Archive |
| 20684 | Clare County Archives | | 1900-1967 | Urban District Council, Register of gunpowder certif... | Kilrush Urban District Council |
| 3694 | Cork City and County Archives | U187 | 1900-1936 | Miscellaneous collection, mostly material on genealo... | Canon Power Papers |
| 12599 | Cork City and County Archives | U283 | 1890-1900 | Two Victorian photograph albums.One contains Cork MP... | |
| 13196 | Cork City and County Archives | U1 | 1870-1900 | Photographs of the Aldworth family, Newmarket, Count... | Aldworth photograph album |
| 23816 | Cork City and County Archives | | 1900-1910
1950-1970 | Rate Valuation Books 1900-1910 & 1950-1970 | Cork City Council Records - Miscellaneous |
| 23836 | Cork City and County Archives | | 1800-1900 | Cemetery Records 1800s-1900s | Cork County Council Records - Miscellaneous |
| 24039 | Cork City and County Archives | U196 | 1900-1901 | Box 4 Includes correspondence relating to the estate... | Colthurst Papers |
| 16946 | Cork Folklore Project | | 1900-2001 | Includes the following interviews (conducted between... | Life Journeys: Living Folklore in Ireland Today |
| 1177 | Cork Public Museum | AQNO1988:8/14 | 1900-1939 | Liam de Róiste Collection of pamphlets, bookl... | Liam de Róiste Collection |
| 13275 | Cork Public Museum | AQNO1986:83/59 | 1900-1940 | A collection of Cork city and county postcards dated... | |
| 528 | County Museum, Dundalk | Lot 208 | 1900 | Woman standing outside a hotel, Clanbrassil Street, ... | Photographs |
| 24062 | County Museum, Dundalk | Lot 56 | 1900 | Women at racing event, Dundalk, c.1900. | Photographs |
| 19073 | Cultural Heritage Services Library, Armagh | 333.53 | 1900-1906 | Bound rental book of the Armagh estate of Mrs T.C. H... | |
| 3421 | Donegal County Archives | CH/BG/4/1 | 1900-1925 | Miscellaneous records, relating to County Donegal Po... | |
| 7574 | Down County Museum | DB496 | 1900 | Printed programme of a Union Jack Concert held in ai... | |
| 20493 | Dublin City Library and Archive | | 1732-1900 | Marriage Registers of Dublin Parishes:Parish and Per... | Dublin Parish Records |
| 20494 | Dublin City Library and Archive | | 1724-1900 | Burial Registers of Dublin Parishes:Parish and Perio... | Dublin Parish Records |
| 18516 | Dublin Diocesan Archives (RC) | AB6 (File 371/1-8) | 1900 | A number of letters from a nun in High Park Convent ... | Walsh Papers |
| 18517 | Dublin Diocesan Archives (RC) | AB6 (File 371/1-8) | 1900 | Letter from a Sister of Charity in Foxford, 11 May, ... | Walsh Papers |
| 18518 | Dublin Diocesan Archives (RC) | AB6 (File 371/1-8) | c.1900 | Typed list regarding St Patrick's, Kilkenny naming t... | Walsh Papers |
| 18520 | Dublin Diocesan Archives (RC) | AB6 (File 371/1-8) | 1900 | Letter from the Presentation Convent in Rathmore, Co... | Walsh Papers |
| 83 | Dublin Writers Museum (Closed) | | 1900-1999 | Portrait of Edna O'Brien by Peter Fitzgerald. | |
| 3126 | Dún Laoghaire-Rathdown County Council | LA1/ | 1900-1931 | Weekly Wage Books listing workmen's names, dutie... | Blackrock |
| 3130 | Dún Laoghaire-Rathdown County Council | LA1/ | 1900-1927 | Poor Rate:157 1 April 1900-30 September 1900158 1 Oc... | Blackrock |
| 19862 | Erasmus Smith Schools Archives | | 1860-1900 | Letters between the administrators of the English sc... | Erasmus Smith Archives |
| 19868 | Erasmus Smith Schools Archives | | 1900-1960 | Insurance policies and pension schemes relating to H... | Erasmus Smith Archives |
| 23156 | Fermanagh County Museum, Enniskillen Castle | FCM-1980-110 | 1900 | A collection of photographs by Annie King in an albu... | Annie King Papers |
| 20461 | Galway County Council Archives | | 1900-1925 | Minute Books:July 1900-September 1901September 1901-... | Portumna Rural District Council |
| 198 | Irish Film Archive | McCabe Collection: Reel 1 | 1900-1999 | McCabe Collection: Reel 10 Amateur 8 mm film which ... | |
| 199 | Irish Film Archive | McCabe Collection: Reel 1 | 1900-1999 | McCabe Collection: Reel 14 Amateur 8mm film which i... | |
| 200 | Irish Film Archive | McCabe Collection: Reel 1 | 1900-1999 | McCabe Collection: Reel 16 Amateur 8 mm film includ... | |
| 201 | Irish Film Archive | McCabe Collection: Reel 1 | 1900-1999 | McCabe Collection: Reel 19 - Visitors, Priests and N... | |
| 202 | Irish Film Archive | McCabe Collection: Reel 2 | 1900-1999 | McCabe Collection: Reel 23 Amateur 8mm film which i... | |
| 212 | Irish Film Archive | Centenary celebrations of | 1900-1999 | Centenary celebrations of a missionary convent: A f... | |
| 218 | Irish Film Archive | Filmbase 3 | 1900-1999 | 'Filmbase 3': Production Company: Filmbase This i... | |
| 222 | Irish Film Archive | McCabe Collection: Reel 7 | 1900-1999 | McCabe Collection: Reel 7 - 'Maureen in Uniform,... | |
| 223 | Irish Film Archive | McCabe Collection: Reel 9 | 1900-1999 | McCabe Collection: Reel 9 - 'Baby and Swimming&#... | |
| 220 | Irish Film Archive | Crawford Collection: Film | 1900-1950 | Crawford Collection: Film 20 Director: William N. C... | |
| 224 | Irish Film Archive | McCabe Collection: Reel 8 | 1900-1999 | McCabe Collection: Reel 8- Waterville, Eskdale, Fr S... | |
| 225 | Irish Film Archive | Return to Kerry | 1900-1999 | 'Return to Kerry': Production Company: Triumph Mot... | |
| 4624 | Irish Jesuit Archives | J18/ | 1900-1914 | 38 Letters to Fr Sutton from Mrs Constance Pott, fou... | Papers of Fr William A Sutton, SJ (1847 to 1922) |
| 22140 | Irish Jesuit Archives | J27/ | 1900-1910 | 52 20 October 1900 - 19 July 1910. A file relating t... | Papers of Fr Matthew Russell, SJ (1834 - 1912) |
| 2233 | Irish Theatre Archive | ITA/46 | 1850-1899
1900-1949 | Picture postcards of popular actors issued as 'S... | Picture postcards of popular actors |
| 2241 | Irish Theatre Archive | ITA/75 | 1800-1899
1900-1999 | Press cuttings, Queen's Theatre, Dublin, 19th to... | Press cuttings, Queen's Theatre, Dublin |
| 2256 | Irish Theatre Archive | ITA/149 | 1900-1949 | Photograph of music hall star, May Murnane. | |
| 21773 | Kerry Diocesan Archives (RC) | C12/23-29 | 1900 | J.G. Eager, Milltown, 1900, Fr Carmody, abuses in pa... | John Coffey, 1889-1904 |
| 1478 | Kerry Local Studies and Archives Department | BG/100/10/1 | 1900-1910 | Quarterly Minute Book October 1900 - July 1910. | |
| 2055 | Kerry Local Studies and Archives Department | RDC/48/A/ | 1900-1925 | Minute Books:1. January 1900 - March 19022. March 19... | Caherciveen Rural District Council |
| 2060 | Kerry Local Studies and Archives Department | RDC/104/A/ | 1900-1918 | Minute Books:1. Year Ended 31 March 19002. Year Ende... | Killarney Rural District Council |
| 2067 | Kerry Local Studies and Archives Department | | 1900-1925 | Quarterly Minute Books:RDC/154/AQ/1 July 1900 - July... | Tralee Rural District Council |
| 21831 | Kerry Local Studies and Archives Department | | 1874-1875
1884
1890-1900 | Rentals of the Earl of Listowel Estates, County Kerr... | O'Connell Solicitors |
| 21878 | Kerry Local Studies and Archives Department | RDC/100/AF/ | 1900-1901 | 1. Financial Minute Book August 1909 - December 1911... | Kenmare Rural District Council |
| 21880 | Kerry Local Studies and Archives Department | RDC/100/AQ/ | 1900-1910 | 1. Quarterly Minute Book 1 October 1900 - July 1910&... | Kenmare Rural District Council |
| 20874 | Kildare Local Studies, Genealogy and Archives Department | | 1900-1935 | Sanitary Committee Minute Book, September 1900-Octob... | Naas Urban District Council |
| 3369 | Kilkenny Local Studies Department | RDC101/B/1 | 1900-1920 | Kilkenny Rural District Council, Outward Letter Book... | Kilkenny Rural District Council |
| 3386 | Kilkenny Local Studies Department | RDC159/AA/1 | 1899-1900 | Rough Minute Book:April 1899-March 1900 | Urlingford Rural District Council |
| 3350 | Kilkenny Local Studies Department | BG57/AK | 1900-1909 | Minute Books under the Medical Charities Acts:1. Apr... | Castlecomer Poor Law Union |
| 3353 | Kilkenny Local Studies Department | RDC57A | 1899-1900 | Minute Books:1. July 1899-October 19002. May 1907-Se... | Castlecomer Rural District Council |
| 11704 | Kilkenny Local Studies Department | CR/D/16 | 1900- 1907 | Kilkenny Corporation Minute Book, 2 July 1900-4 Febr... | Kilkenny Corporation |
| 11712 | Kilkenny Local Studies Department | CR/D/23 | 1900-1905 | Kilkenny Corporation, Weekly Minute Book, 26 June 19... | Kilkenny Corporation |
| 12400 | Kilmainham Gaol Museum | 16Bg-1C17-6 | 1900-1913 | Inighinidhe na hÉireann sash, may have belong... | Irish Volunteers |
| 13272 | Kilmainham Gaol Museum | 17PC-1A44-12 | 1900 | Photo of Countess Markievicz, 1900. | Easter Week |
| 13468 | Kilmainham Gaol Museum | 10LG-1C35-4 | 1900
1921 | Marriage certificate of Casimir Markievicz and Const... | Home Rule |
| 20944 | King's Hospital School | 17-32 | 1884-1900 | 29 Headmaster's Report Book, 1884 - 1900. | King's Hospital Records |
| 20945 | King's Hospital School | 17-32 | 1900-1911 | 30 Headmaster's Report Book, 1900 - 1911. | King's Hospital Records |
| 21152 | King's Hospital School | 232-236A | 1900 | 226H Mercer's Rental, 1900. | King's Hospital Records |
| 4868 | King's Inns Library | I/2/3 | 1900-1926 | Membership Records, barristers and students, name, a... | Records of the Honorable Society of King's Inns |
| 5605 | Laois Local Studies | | 1900-1966 | Minute Books, 1930-1939, 6 volumes. Receipt Book, 1... | Maryborough District Lunatic Asylum |
| 14479 | Laois Local Studies | | 1900-1957 | Inlcudes images of Abbeyleix House and Demesne and o... | Ivo De Vesci Photographic Collection |
| 21704 | Laois Local Studies | | 1899-1900 | Minute Books of the Mountmellick Rural District Coun... | Laois Local Authority Records |
| 21705 | Laois Local Studies | | 1900-1925 | Minute Book, Queen's County Council, 1900-1925. | Laois Local Authority Records |
| 2131 | Leitrim Local Studies Department | BG177/AC/ | 1862-1900 | Agenda Books:1 - Proceedings of the Guardians 1861-1... | Manorhamilton Poor Law Union |
| 22300 | Leitrim Local Studies Department | | 1900-1901 | Minute Book:May 1900 - June 1901 | Ballinamore Rural District Council |
| 22369 | Leitrim Local Studies Department | | 1904-1910
1900-1901 | Irish National Foresters' Minute Book, Ballinamo... | Miscellaneous Records, Leitrim |
| 14469 | Longford Archives and Local Studies | | 1900-1925 | Minute Books:15 March 1900 - 7 June 190818 April 190... | Ballymahon Rural District Council |
| 14471 | Longford Archives and Local Studies | | 1900-1923 | Minute Books:15 March 1900 - 7 June 190818 April 190... | Ballymahon Rural District Council |
| 5003 | Maynooth University and St Patrick's College, Maynooth | | 1900 | Letter from Una Farrelly to Eoin MacNeill, 1900. | |
| 5759 | Maynooth University and St Patrick's College, Maynooth | | 1900-1914 | Material is on temporary deposit. Volume containing... | Movement for the Parliamentary Enhancement of Women |
| 14521 | Mayo Local History Department | | 1900-1904 | Financial Statement Book, Expenditure, 1900-1904 | Ballinrobe Rural District Council |
| 14534 | Mayo Local History Department | | 1900 | Minute Book, June 1900-September 1900. | Castlebar Poor Law Union |
| 14554 | Mayo Local History Department | | 1900-1921 | Legal Matters and Workhouse Administration,1900-1921... | Ballinrobe Poor Law Union |
| 20134 | Meath Local Studies and Family History Department | Box F/ | 1900 | 15 Bundle of receipts regarding Mountainstown, 1900'... | Mountainstown Documents |
| 20143 | Meath Local Studies and Family History Department | Box C/ | 1900 | 1 Fifty-eight letters (early 1900's) from A.J. Pollo... | Mountainstown Documents |
| 20234 | Meath Local Studies and Family History Department | Box B/ | 1900-1904 | 3 Account Book, 1900-1904, including: a. receipt for... | Mountainstown Documents |
| 1853 | Monaghan County Library Genealogy and Local History Department | | 1900-1971 | Correspondence Book, 1905-1909 (100 pages) . Resolu... | |
| 21505 | Monaghan County Museum | | 1900-1905
1912-1926
1937-1954
1955-1960 | County Committee of Agriculture Minutes1991:I0B - 19... | County Monaghan Local Authority Records |
| 21506 | Monaghan County Museum | | 1871-1886
1889-1900
1910-1915 | Ballybay Town Commissioners1976:85 Outward Correspon... | County Monaghan Local Authority Records |
| 21561 | Monaghan County Museum | | 1900-1925 | Moutray (North Monaghan), 1900-25 (275 items) | |
| 636 | National Archives of Ireland | BG/137/ | 1900-1918 | Rathdown Rural District Council number 1, Minute Boo... | Rathdown Poor Law Union and Rural District Council |
| 712 | National Archives of Ireland | BG/78/ | 1900-1908 | Register of Admission and Discharge:G81 13 March 190... | North Dublin Poor Law Union and Rural District Council |
| 3929 | National Archives of Ireland | RHK 6/3 | c.1900 | Benevolent Funds: Dublin Garrison Needlework Associa... | Royal Hospital Kilmainham |
| 3937 | National Archives of Ireland | s21340 | 1900 | Lucy Clark, application for post of female detective... | Crime Branch Special Records |
| 3938 | National Archives of Ireland | s2344 | 1900 | Visit of Countess Cadogan to Limerick, 13 December 1... | Crime Branch Special Records |
| 3940 | National Archives of Ireland | s24060 | 1900
1901 | 'Daughters of Erin' [Inghinidhe na h-É... | Crime Branch Special Records |
| 8844 | National Archives of Ireland | IB/1/16 | 1900 | Wills and other Testamentary Records: District Regis... | |
| 11490 | National Archives of Ireland | 1189/13/6 | 1899-1900 | Letters to John Woulfe Flanagan, May 1899-February 1... | Woulfe Flanagan |
| 11491 | National Archives of Ireland | 1189/13/8 | 1897-1900 | Letters to John Woulfe Flanagan, June 1897 - March 1... | Woulfe Flanagan |
| 11492 | National Archives of Ireland | 1189/13/10 | 1899-1900 | Miscellaneous letters to John Woulfe Flanagan, April... | Woulfe Flanagan |
| 11493 | National Archives of Ireland | 1189/14/8 | 1900-1901 | Letters to John Woulfe Flanagan, 2 March 1900 -19 Ma... | Woulfe Flanagan |
| 14099 | National Archives of Ireland | 1190/4 | 1898-1900 | Four letters from her sister Tina, 1898-1900. | Sweetman Correspondence |
| 14100 | National Archives of Ireland | 1190/4 | 1899-1900 | Five letters from her cousin Nan Coppinger, 1899-190... | Sweetman Correspondence |
| 14101 | National Archives of Ireland | 1190/4 | 1900 | Two letters from Kitty, 1900 and no date. | Sweetman Correspondence |
| 15263 | National Archives of Ireland | 2002/78 | 1900-1929 | National School records for Kilcommon, Co. Wicklow. | National Schools, Private Accessions |
| 15589 | National Archives of Ireland | 999/197/2 | 1900 | High Court of Justice Chancery Co. Cavan Trustees of... | Small Private Accessions |
| 11435 | National Archives of Ireland | PCO/MB/20/3/764-773 | 1895-1900 | Privy Council Office Minute Book, Number 20, 6 May 1... | Privy Council Records |
| 12214 | National Archives of Ireland | 97/46/3/1-24/ | 1796-1900 | Letter Books: 30 December 1796 - 8 January 1820, inc... | Pembroke Estate Papers |
| 16477 | National Irish Visual Arts Library (NIVAL) | NIVAL FNCI | 1900-1999 | Arrangement:Annual ReportsArtifactsCyril McKeon'... | Friends of the National Collections |
| 139 | National Library of Ireland | Ms18463 | 1900 | Account by Maura O'Neill Mackey of preparation by Co... | |
| 974 | National Library of Ireland | Ms11426 | 1900-1999 | Copy of the Recollections of Miss Stopford, sometime... | |
| 907 | National Library of Ireland | Mss5518-5574 | 1831-1900 | Mss5518-5528 Index to Minutes of Board Meetings of t... | |
| 1941 | National Library of Ireland | Mss4655-4670 | 1900-1907 | Sixteen copybooks containing Mary A Hutton's verse t... | |
| 1985 | National Library of Ireland | Mss7319-7320 | 1900-1906 | Newspaper cuttings containing reviews on the novel, ... | |
| 1990 | National Library of Ireland | Ms7368 | 1900-1949 | Photostat copy of an undated letter from G W Russel... | |
| 2462 | National Library of Ireland | Ms8561 | 1805-1900 | Correspondence of members of the Browne family of Fa... | Browne Papers |
| 2500 | National Library of Ireland | Mss10443-10448 | 1900 | Essays by Alice Stopford Green on various Irish topi... | Alice Stopford Green Papers |
| 2503 | National Library of Ireland | Ms8614 | 1900-1934 | Letters from Douglas Hyde to Mrs Mary Hutton, some i... | Mary Hutton Papers |
| 2506 | National Library of Ireland | Ms13076(1-3) | 1900-1915 | Correspondence which includes letters from Gertrude ... | Casement Papers |
| 2509 | National Library of Ireland | Ms8616 | 1900-1910 | Letters from Kuno Meyer to Mrs Mary Hutton, dealing ... | Mary Hutton Papers |
| 2565 | National Library of Ireland | Ms10714 | c1900-1926 | Nineteen letters of Maud Gonne MacBride to M and Mme... | F.S. Bourke Collection |
| 2669 | National Library of Ireland | Ms8149 | 1800-1899
1900-1999 | Collection of letters to Sarah Purser, including 13 ... | |
| 2875 | National Library of Ireland | Ms412 | 1900-1950 | A notebook containing poems of Mrs J O' Donovan Ross... | O' Donovan Rossa Papers |
| 2909 | National Library of Ireland | Ms8520 | 1900-1915 | Esmonde family letters which include copies of lette... | Esmonde Papers |
| 3477 | National Library of Ireland | Ms10656 | 1864-1900 | Thirteen letters of Frederick Burton to various peop... | |
| 3490 | National Library of Ireland | Mss10902-10903 | c1900-1940 | Literary remains of Christinia M Doyle and c75 lette... | |
| 2381 | National Library of Ireland | Ms24555 | 1382-c1900 | Papers relating to the Colclough family of Tintern, ... | Colclough Papers |
| 2464 | National Library of Ireland | Ms8002 | c1870-c1900 | Letters to Ellen O'Leary from James Brittan, R W Col... | |
| 2508 | National Library of Ireland | Ms13078 | c1900-1936 | Letters from various correspondents to Roger Casemen... | Casement Papers |
| 3498 | National Library of Ireland | Ms10957 | c1900 | A calendar of anniversaries of Irish interest compil... | |
| 3587 | National Library of Ireland | Mss12101-12104 | 1791-1900 | Micellaneous records relating to the Female Orphan ... | |
| 3742 | National Library of Ireland | Ms 13482 | 1900-1901 | Letters to T P Gill, including letters from, among o... | T.P. Gill Papers |
| 8976 | National Library of Ireland | Ms13526 | 1886
1889
1900 | Lists of: Philadelphia subscribers to the Irish Parl... | T.P. Gill Papers |
| 9075 | National Library of Ireland | Ms14218 | 1860-c1900 | Carbon typescript of chapters 1-19 of `Recollections... | |
| 9182 | National Library of Ireland | Ms15202 | 1900-1917 | Letters to John Redmond, 1900-1917, correspondents i... | Redmond Papers |
| 9226 | National Library of Ireland | Ms15451 | 1900-1903 | Two letters to Miss C.M. Doyle concerning Gaelic Lea... | |
| 9373 | National Library of Ireland | Ms23998 | c1900 | Maps and lists of tenants of the estates of the Marq... | Ormonde Papers |
| 9480 | National Library of Ireland | Mss25284-25,291 | c1900-1925 | Albums of photographs taken at home and abroad of me... | |
| 9481 | National Library of Ireland | Mss25292-25294 | c1900-1910 | Albums of postcards, Irish, British and continental,... | |
| 9505 | National Library of Ireland | Ms26755 | c1900-1912 | Miscellaneous letters and other documents, includes,... | Frederick J Allan Papers |
| 9539 | National Library of Ireland | Ms29775(1-8) | 1800-1900 | Family correspondence, 1800-1900. There are 8 folder... | Bruen of Oakpark (County Carlow) Papers |
| 9721 | National Library of Ireland | Ms18158 | c1900-1915 | Correspondence on behalf of tenants of estates of: W... | Papers of Very Revd. P Canon Phelan, PP |
| 9771 | National Library of Ireland | Ms18461 | 1900 | Typescript copy of an incomplete letter to Dr Seamus... | |
| 10038 | National Library of Ireland | Ms17730 | c1880-1900 | Letters to de Cobain from his sister, Laura, in Belf... | Revd. Fletcher de Cobain Papers |
| 10063 | National Library of Ireland | Ms15998 | 1893-1900 | Correspondence of 14th Viscount Gormanston while Gov... | Gormanston Papers |
| 10080 | National Library of Ireland | Ms16168 | c1900 | Newspaper cuttings referring to Lord Edward Fitzgera... | Lord Walter Fitzgearld Papers |
| 10085 | National Library of Ireland | Ms16204 | c1900-1940 | Sketchbook of Ivy Little with sketches and autograph... | |
| 10655 | National Library of Ireland | Mss16695-16696 | c1900 | Draft autobiography in manuscript form of J F X O'Br... | |
| 10684 | National Library of Ireland | Ms17051-17052 | 1900-1960 | Letters, mainly to Mrs Helen Verdon, relating to the... | Verdon Papers |
| 10707 | National Library of Ireland | Ms17291 | c1900-1909 | Letters from Lady Gregory to Douglas Hyde relating t... | |
| 10755 | National Library of Ireland | Ms19933 | 1899-1900 | Minute Book of the Irish Transvaal committee for org... | |
| 10804 | National Library of Ireland | Ms20746 | 1895-1900 | Rentals and accounts of the estate of William Joseph... | Teeling Papers |
| 10831 | National Library of Ireland | Ms21128 | 1899-1900 | Seven letters from C V Stanford, August 1899-Novembe... | |
| 10973 | National Library of Ireland | Ms22930 | c1900 | Photocopy of a letter from J M Synge to his mother, ... | |
| 11083 | National Library of Ireland | Ms19459 | [c1900-1910] | Scheme for distribution of the estate of Blanche H T... | |
| 11957 | National Library of Ireland | Mss12594-12600 | 1890-1900 | Swinford Poor Law Union Minute Books: Ms12,594 6 De... | Swinford Poor Law Union |
| 12262 | National Library of Ireland | Mss12682-12696 | 1900-1915 | Westport Poor Law Union Minute Books: July 1900-Janu... | Westport Poor Law Union |
| 12269 | National Library of Ireland | Mss12281-12300 | 1900-1910 | Ballina Poor Law Union Minute Books, January 1900-Ja... | Ballina Poor Law Union |
| 12276 | National Library of Ireland | Mss12435-12448 | 1900-1910 | Castlebar Poor Law Union Minute Books, September 190... | Castlebar Poor Law Union |
| 9461 | National Library of Ireland | Ms24565 | c1900-1925 | Photographs relating to the Ball family, c1900-1925,... | |
| 12010 | National Library of Ireland | Mss33242(30)-33242(30)/A | 1896-1900 | Ms 33,242(30) Letter from Maud Gonne to Edmund Harv... | Rosamund Jacob Papers |
| 12789 | National Library of Ireland | | 1900-1950
1997-1999
1980
1996 | The Sheehy Skeffington Collection is a vast collecti... | Sheehy-Skeffington Papers |
| 11567 | National Photographic Archive | LawrenceR/2215 | c1900 | Ladies bathing place, Portrush Antrim, c1900, includ... | Lawrence |
| 19041 | Newry City Library | | 1900-1907
1838 | Manuscript abstract of the title of Mrs Mary Bredon,... | The Crossle Papers |
| 4828 | Newtown School, Waterford | A1/2 | 1900 | Appeals, 1900. | |
| 4830 | Newtown School, Waterford | A/4 | 1900 | Clothing Lists, 1900. | |
| 5406 | Newtown School, Waterford | A1/12 | 1900 | Parents, Letters to, 1900: Newtown School, Waterford | |
| 5407 | Newtown School, Waterford | A1/13 | 1900 | Prospectus, 1900: Newtown School, Waterford | |
| 5409 | Newtown School, Waterford | A1/15 | 1900-1950 | Reports Issued by School, 1900-1950: Newtown School,... | |
| 5410 | Newtown School, Waterford | A1/16 | 1900-1971 | Rules, 1900-1971: Newtown School, Waterford | |
| 5511 | Newtown School, Waterford | | 1900 | Parents, Letters to, 1900: Newtown School, Waterford | |
| 5512 | Newtown School, Waterford | 94/507 | 1900 | Prospectus, 1900: Newtown School, Waterford | |
| 5514 | Newtown School, Waterford | | 1900-1950 | Reports Issued by School, 1900-1950: Newtown School,... | |
| 5515 | Newtown School, Waterford | | 1900-1971 | Rules, 1900-1971: Newtown School, Waterford | |
| 18880 | Offaly Archives | OCL KRDC35/2 | 1900-1918 | 1 Quarterly Minute Book -
KRDC35/2: July 1900 - Oct... | Records of Kilbeggan Rural District Council |
| 18957 | Offaly Archives | OCL TRDC36/2 | 1900-1911 | 1 Quarterly Minute Book: July 1900 - April 1911 | Records of Tullamore Rural District Council |
| 21400 | Our Lady's Hospital, Cork | | 1900-1962 | Anatomical charts, 1900-1962, for instructing nurses... | |
| 21409 | Our Lady's Hospital, Cork | | 1900 | Minutes of the Proceedings of the Committee of Manag... | |
| 21410 | Our Lady's Hospital, Cork | | 1900 | Newspapercuttings Book, c.1900. | |
| 16685 | Presentation Sisters Congregational Archives | | 1900 | Account of the centenary celebrations in September 1... | Presentation Convent, Kilkenny |
| 1809 | Public Record Office of Northern Ireland | D/1999 | 1900s | Genealogy of the Moore family, 1263 to 1908, compile... | |
| 1813 | Public Record Office of Northern Ireland | D/2008 | c.1820-c.1900 | 6 volumes and c.200 miscellaneous Dunn family papers... | |
| 1824 | Public Record Office of Northern Ireland | D/2031 | c.1900-1928 | This collection of c.100 documents relating to the R... | |
| 6325 | Public Record Office of Northern Ireland | D/1042/1 | 1899-1900 | Wages book of a hemstitching factory owned by John J... | |
| 6839 | Public Record Office of Northern Ireland | D/3467 | c1900-1920 | 72 portrait photographs, probably of the Nelis famil... | |
| 7098 | Public Record Office of Northern Ireland | D/2774 | c1900-1968 | Papers of Inglis and Company, Bakers and Flour Mille... | |
| 7131 | Public Record Office of Northern Ireland | D/2884 | c1900 | Photograph of Queen Victoria in a horse drawn carria... | |
| 7347 | Public Record Office of Northern Ireland | D/3767 | 1900-1930 | Minute books of Newcastle Lawn Tennis and Croquet Cl... | |
| 7400 | Public Record Office of Northern Ireland | D/3931 | c1900 | Volume of prints and photographs by R Welsh of York ... | |
| 7581 | Public Record Office of Northern Ireland | DIO(RC)1/ | 1785-c.1900 | These records have been copied from Clogher Roman Ca... | Diocese of Clogher (Roman Catholic) Records |
| 7907 | Public Record Office of Northern Ireland | T/1187/1 | 1831-1900 | Copy pedigree of the Kerr family of Ballyshannon, Co... | |
| 6359 | Public Record Office of Northern Ireland | D/3305 | 1822-1900 | Emigrant letters from the United States and Canada, ... | |
| 6364 | Public Record Office of Northern Ireland | D/3320/1-38 | c1900-1926 | Bundle of miscellaneous papers of Martha Jennings of... | |
| 6511 | Public Record Office of Northern Ireland | D/1333/ | 1900
1902 | D/1333/152 Separation agreement, James and Annie Qua... | |
| 6515 | Public Record Office of Northern Ireland | D/1364/ | 1856
1900 | D/1364/J/21 Letters from William Young, Fenaghy, Cou... | Young Papers |
| 6536 | Public Record Office of Northern Ireland | D/1493/1 | c.1900 | Bundle of c.50 designs and transfers for embroidery,... | |
| 8132 | Public Record Office of Northern Ireland | T/1877/1 | 1700-1900 | Pedigrees of the Orr family, Maydown, County Londond... | |
| 8147 | Public Record Office of Northern Ireland | T/1915/1 | 1731-1900
1906 | Genealogical notes on the Thomson family, Coleraine,... | |
| 8176 | Public Record Office of Northern Ireland | T/1989/1 | c1900 | Genealogical memorandum concerning the Harris family... | |
| 6540 | Public Record Office of Northern Ireland | D/1501/1-6 | c.1900 | Photographs of musical comedy artists, including Mrs... | |
| 6574 | Public Record Office of Northern Ireland | D/1639/1 | c.1900 | Genealogical memoirs of the Archdale family of Castl... | Archdale Papers |
| 6641 | Public Record Office of Northern Ireland | D/1794 | c1900-c1958 | 5 postcard albums and a small parcel of postcards, t... | |
| 6675 | Public Record Office of Northern Ireland | D/1884/ | 1900-1930 | D/1884/1/3-6 Minutes and printed reports of the Omag... | W.R. Scott Papers |
| 6685 | Public Record Office of Northern Ireland | D/1909 | c.1838-c.1900 | This collection of 22 documents includes: Part of a ... | |
| 8179 | Public Record Office of Northern Ireland | T/2004/1 | 1628-1900 | Pedigree of the Barry family, Killyleagh, Killinchy,... | |
| 8186 | Public Record Office of Northern Ireland | T/2017/1 | c1900 | Photograph of the employees of Broadway Damask Compa... | |
| 8704 | Public Record Office of Northern Ireland | T/862/2 | 1700-1900 | Copies of genealogical notes on the Henderson family... | |
| 6701 | Public Record Office of Northern Ireland | D/1936 | c.1900, c.1930 | Typescript of Gillespie family records, compiled c.1... | |
| 6712 | Public Record Office of Northern Ireland | D/1954 | 1818-1900 | This collection includes 86 rental books of Viscount... | |
| 6723 | Public Record Office of Northern Ireland | D/2050 | c.1900-1950 | This collection includes family photographs of the M... | |
| 6745 | Public Record Office of Northern Ireland | D/2096 | c.1900-1914 | This collection of c.600 documents comprises of note... | |
| 6755 | Public Record Office of Northern Ireland | D/2124 | 1766-1900 | 66 documents including: Letters of administration fr... | |
| 6762 | Public Record Office of Northern Ireland | D/2149 | c.1900-1926 | c.200 documents relating to the business of the Bell... | |
| 6763 | Public Record Office of Northern Ireland | D/2152 | 1880-c.1900 | This collection of 3 volumes is also available on mi... | |
| 6783 | Public Record Office of Northern Ireland | D/2231 | c.1900 | This collection includes 6 boxes of Butler family pa... | |
| 6843 | Public Record Office of Northern Ireland | D/3480 | c1900-c1910 | D/3480/4/1 Inspectors' Report on sweated labour in ... | |
| 6856 | Public Record Office of Northern Ireland | D/3513 | 1788-c1900 | A detailed calendar of this collection of c120 docum... | |
| 6994 | Public Record Office of Northern Ireland | D/2479/ | c.1900-1935 | D/2479/1/1-9 9 diaries of Charlotte Despard. These i... | |
| 7062 | Public Record Office of Northern Ireland | D/2681 | c.1760s-c.1900 | 163 documents relating to the Foster/Massereene fami... | Foster-Massereene Papers |
| 7074 | Public Record Office of Northern Ireland | D/2707 | 1675-c.1900 | c.4,500 documents relating to the Earls and Viscount... | Shannon Papers |
| 7086 | Public Record Office of Northern Ireland | D/2740 | c.1900-1959 | This miscellaneous collection includes: Subscription... | |
| 7101 | Public Record Office of Northern Ireland | D/2778 | 1860-1900 | Collection of 90 volumes and c 4220 documents relati... | Workman Papers |
| 7148 | Public Record Office of Northern Ireland | D/2959 | 1868-1900 | 2 copy out-letter books of J N Richardson, Mount Cau... | Richardson Papers |
| 7163 | Public Record Office of Northern Ireland | D/2991 | c1900-1970 | Collection of c3,000 documents and 24 volumes, c1900... | Cahir Healy Papers |
| 7302 | Public Record Office of Northern Ireland | D/3632 | 1585-c.1900 | c.500 volumes and c.15,000 documents recording the a... | Drapers' Company Records |
| 7323 | Public Record Office of Northern Ireland | D/3688/F/8 | 1793-1900 | 27 emigrant letters from James Brown, Philadelphia, ... | |
| 7369 | Public Record Office of Northern Ireland | D/3835/E | c1900-1954 | Papers of Lady Nugent, Mount Nugent, Farren Connell,... | |
| 7417 | Public Record Office of Northern Ireland | D/3985 | c1900-1930s | 2 photographs of the actress Miss Margaret Greenlee,... | |
| 7553 | Public Record Office of Northern Ireland | D/961/1 | c.1900-c.1914 | Minute book of Belfast Footlights Amateur Dramatic C... | Anderson Papers |
| 7614 | Public Record Office of Northern Ireland | GPB/6 | 1900-1921 | Miscellaneous papers of the General Prisons Board fo... | General Prisons Board for Northern Ireland Records |
| 7688 | Public Record Office of Northern Ireland | LA/41/ | 1900-1973 | Local Authority records are closed for 30 years from... | Kilkeel Rural District Council Records |
| 7694 | Public Record Office of Northern Ireland | LA/47/ | c.1900-1973 | Local Authority records are closed for 30 years from... | Lisburn Rural District Council Records |
| 7723 | Public Record Office of Northern Ireland | LA/74/ | 1900-1920 | Local Authority records are closed for 30 years from... | Trillick Rural District Council Records |
| 7770 | Public Record Office of Northern Ireland | MIC/320 | c.1860-1900 | Microfilmed copies of selected letters of Queen Vict... | Dufferin and Ava Papers |
| 7782 | Public Record Office of Northern Ireland | MIC/46 | c.1880-1900 | Microfilmed letters from Annie Magill, later Wallace... | Pinkerton (Coleraine) Papers |
| 7838 | Public Record Office of Northern Ireland | T/1028 | 1668-1900 | Copies of notes, including census returns and tombst... | |
| 7886 | Public Record Office of Northern Ireland | T/1129 | c1900 | A copy of a print of Queen Elizabeth I, no date. A ... | |
| 7901 | Public Record Office of Northern Ireland | T/1177 | 1736-c1900 | T/1177/1 Copy of a certificate of recommendation by... | |
| 7961 | Public Record Office of Northern Ireland | T/1341/1 | 1600-1900 | Pedigree of the Wilkin family, Carrickreagh, County ... | |
| 7985 | Public Record Office of Northern Ireland | T/1416/1 | 1745-1900 | Pedigree of the Bronte family, Lisnacreevy and Bally... | |
| 7998 | Public Record Office of Northern Ireland | T/1454/ | c.1800-c.1900 | This collection of c.50 documents includes, for exam... | |
| 8006 | Public Record Office of Northern Ireland | T/1472/2 | 1742-1900 | Pedigree of the Perceval family, Downpatrick, County... | |
| 8045 | Public Record Office of Northern Ireland | T/1591 | c.1900 | Copy of a manuscript draft of a speech attacking ... | |
| 8071 | Public Record Office of Northern Ireland | T/1662 | 1500-1900 | Pedigree of the Stewart family, Fortstewart, County ... | |
| 8072 | Public Record Office of Northern Ireland | T/1663 | 1700-1900 | Pedigree of the McCrum family, Carnmoney, County Ant... | |
| 8082 | Public Record Office of Northern Ireland | T/1698/ | 1879-c.1900 | T/1698/1 Copy of an emigrant letter from William Car... | |
| 8113 | Public Record Office of Northern Ireland | T/1832 | 1700-1900
1961 | Pedigree of the Barton family, Boa Island, County Fe... | |
| 8124 | Public Record Office of Northern Ireland | T/1861 | 1700-1900
1935 | Copy of a letter from Sam Allen, Glasgow to 'Amy' wi... | |
| 8134 | Public Record Office of Northern Ireland | T/1879 | 1890-c1900 | This collection includes, for example: Copies of pho... | |
| 8160 | Public Record Office of Northern Ireland | T/1959/1-8 | c1890-c1900 | This collection of copies of c70 documents includes,... | |
| 8172 | Public Record Office of Northern Ireland | T/1985 | 1788-c1900 | Copy of part of a letter from [?] Jennings, Preston ... | |
| 8208 | Public Record Office of Northern Ireland | T/2068/1 | 1900-1940 | Pedigree of the Armstong and Stokes family, Belfast,... | |
| 8213 | Public Record Office of Northern Ireland | T/2080 | 1821-c.1900 | This collection of 17 documents is comprised of copi... | |
| 8223 | Public Record Office of Northern Ireland | T/2111 | 1819-1900
1857
1962 | c.42 documents comprising of photographs and photost... | |
| 8230 | Public Record Office of Northern Ireland | T/2133/1 | 1700-1900 | Genealogical notes on the Nash family, Parish of Far... | |
| 8241 | Public Record Office of Northern Ireland | T/2160 | 1600-1900 | Copy of a manuscript volume of genealogical notes on... | |
| 8244 | Public Record Office of Northern Ireland | T/2168/1-7 | c.1900-1952 | Copies of 2 photographs taken in Melbourne, Australi... | |
| 8263 | Public Record Office of Northern Ireland | T/2226/ | c.1872-c.1900 | T/2226/1 Copies of manuscript biographical notes on ... | |
| 8270 | Public Record Office of Northern Ireland | T/2246/1 | 1750-1900 | Genealogy of the Atkinson family, Crowhill, Portadow... | |
| 8285 | Public Record Office of Northern Ireland | T/2287/1-2 | 1600-1900
1903 | Genealogy and genealogical notes on the Richardson f... | |
| 8299 | Public Record Office of Northern Ireland | T/2348 | 1329-1900
1966 | Typescript notes on the history of the Moneypenny fa... | |
| 8318 | Public Record Office of Northern Ireland | T/2404/ | 1900-1902 | Copies of 222 letters of the Formby family including... | |
| 8319 | Public Record Office of Northern Ireland | T/2411/1 | c.1900 | Packet of prints of photographs by Welsh of County D... | |
| 8386 | Public Record Office of Northern Ireland | T/2581 | 1801-1900s | This collection of 81 documents includes, for exampl... | |
| 8412 | Public Record Office of Northern Ireland | T/2629 | 1899-c1900 | T/2629/2/5 Genealogical notes on the McRoberts fami... | |
| 8502 | Public Record Office of Northern Ireland | T/2884/ | 1793-c.1900 | T/2884/1 Copies of love letters from Doctor William ... | |
| 8532 | Public Record Office of Northern Ireland | T/3009 | c.1900s | This collection includes copies of photographs of fa... | |
| 8659 | Public Record Office of Northern Ireland | T/687/19 | 1700-1900 | Copy pedigree of the Pogue or Pollock family and the... | |
| 873 | Religious Society of Friends in Ireland Historical Library | Mss Box 8 | 1794-1900 | Letter from Henry Chandlee, M D, to his daughter Eli... | Handlists: Mss Boxes, Pamphlets Boxes, etc. |
| 1214 | Religious Society of Friends in Ireland Historical Library | P145 | 1900 | Mounted unframed photograph, c1900. Including Susan ... | Photographic Collections |
| 870 | Religious Society of Friends in Ireland Historical Library | Albums 1-40 | 1870-1871
1874-1914
1893-1900
1946-1948
1909
1912
1925 | Albums 2-3 Commissioners of the Friends War Victims... | Photographic Collections |
| 1275 | Religious Society of Friends in Ireland Historical Library | MMII/B1-7 | 1757-1900 | Women's Meeting: MMII/B1 Minutes of Women's Monthly... | Dublin Monthly Meeting |
| 3542 | Religious Society of Friends in Ireland Historical Library | MM/XIIC6/Reel 17 | 1879-1900 | Ministers's and Elders' Minutes, Lisburn Monthly Mee... | |
| 3566 | Religious Society of Friends in Ireland Historical Library | LGM/4/2/Reel 29A | 1870-1900 | Ministers and Elders' Minutes, Lurgan Monthly Meetin... | |
| 22386 | Religious Society of Friends, Cork | | 1896-1900 | Cork Young Friend's Association Minute Book, 1896-19... | |
| 2176 | Representative Church Body Library | Ms520 | 1900-1950 | Incomplete letter from Miss Gregg, novelist under th... | Miss Hilda Caroline Gregg |
| 2198 | Representative Church Body Library | Ms317 | 1900-1959 | The Zenana Society was founded in 1880 to evangelise... | Church of England Zenana Missionary Society, Hibernian Auxiliary |
| 22085 | Representative Church Body Library | B5 | 1895-1900
1901-1907
1966 | St Fin Barre's Parish, Register of Parishioners:... | St Fin Barre's Cathedral Cork Archive |
| 23505 | Representative Church Body Library | RCBL MS 749 | 1900 | Copies of an address to the Queen, 1900. | Mothers' Union Collection |
| 23713 | Representative Church Body Library | | 1900-1978 | Box containing:Manuscript, 1 volume, Council minute ... | Young Women's Christian Association (YWCA) |
| 23734 | Representative Church Body Library | MS607/ | 1900-1906
1941-1965 | Financial Records: 8/ Ladies' Allowance Books: 1: 19... | Records of the Mageough Home, Dublin |
| 73 | Roscommon Local Studies and Archives | | 1900-1916 | Rural District Council Minutes and Quarterly Minute ... | Boyle Local Authority Records |
| 447 | Roscommon Local Studies and Archives | | 1740-1799
1800-1899
1900-1989 | There are a number of files containing material rela... | Miscellaneous |
| 22411 | Royal College of Physicians of Ireland | | 1878-1890
1891-1900 | Maternity Registers, 1891-1900. Patients Admission... | Sir Patrick Dun's Hospital |
| 2380 | Royal Irish Academy | Ms12/O/24 | 1900-1966 | Correspondence from Celtic and other scholars, 1900-... | Eleanor Knott |
| 25066 | Royal Irish Academy | SR/12/X/19 | 1900 | Letter from P. Hanson to H.G. Hinkson, November 1900... | Katherine Tynan Papers |
| 24925 | Royal Irish Academy of Music | | 1900-1902 | 18: 28 November 1900 - 24 September 1902, on primary... | |
| 5204 | RTÉ Stills Library | 0259/052 | 1900 | Women dressed in traditional Irish clothing in c.190... | Illustration Library |
| 22695 | South Eastern Education and Library Board Local History Collection | | 1877-1900 | Downpatrick Board of Guardian Minutes [20 reels copi... | Local Studies Collection |
| 22024 | St Davnet's Hospital, Monaghan | | c.1900-1931 | Index to Monaghan District Lunatic Asylum, early 20t... | Monaghan District Lunatic Asylum |
| 7592 | St Malachy's College, Belfast | E2 | 1898
1900 | One folder which includes:A handwritten diary of Can... | |
| 24297 | Tipperary County Archives | | 1744-1900 | A large volume, double-sided, dated 1900, lists:a. b... | Clonmel Corporation |
| 24328 | Tipperary County Archives | | 1900 | Corporation of Clonmel, Deeds and Documents: Schedul... | Clonmel Corporation |
| 1678 | Tipperary Studies | | 1900-1912 | Absract of County Liabilities and Expenditure for ha... | Tipperary Local Authority Records |
| 1682 | Tipperary Studies | | 1900-1925 | Clogheen Rural District Council Minute Books:1 April... | Clogheen Rural District Council |
| 1686 | Tipperary Studies | | 1900-1925 | Nenagh Rural District Council Minute Books:1 Septemb... | Nenagh Rural District Council |
| 19809 | Tipperary Studies | | 1900-1924 | Thurles Rural District Council Quarterly Minute Book... | Thurles Rural District Council |
| 19818 | Tipperary Studies | | 1869-1900 | Register of Deaths in the Workhouse: October 1869-Se... | Thurles Poor Law Union |
| 19831 | Tipperary Studies | | 1900-1920 | Gortnahoe Rural District Council Quarterly Minute Bo... | Gortnahoe Rural District Council |
| 11211 | Trinity College Dublin, Manuscripts and Archives Department | V/170 | 1900-1902 | Jane Semple's Weekly Rental, 1900-1902. | Courtown Papers |
| 10121 | Trinity College Dublin, Manuscripts and Archives Department | TCDMs102471/1/1-17 | 1846
1853
1858
1900 | Correspondence of female members of the Wynne family... | Wynne Family Papers |
| 10231 | Trinity College Dublin, Manuscripts and Archives Department | TCDMs7392 | 1832-1900 | Miscellaneous Stokes family and other correspondence... | Whitley Stokes Papers |
| 10294 | Trinity College Dublin, Manuscripts and Archives Department | TCDMs6222 | 1900-1908 | Extracts made by E M Stephens for his life of J M Sy... | |
| 10297 | Trinity College Dublin, Manuscripts and Archives Department | TCDMs8968 | 1900-1901 | English Language Lecture Notebook of Catherine B Sen... | |
| 10313 | Trinity College Dublin, Manuscripts and Archives Department | TCDMs4503 | 1898-1900 | Album of sketches, poems, letters, music mainly in G... | O'Sullivan/Solomons Collection |
| 10320 | Trinity College Dublin, Manuscripts and Archives Department | TCDMs4508 | 1900-1999 | Accounts relating to an [?art exhibition], [?for the... | O'Sullivan/Solomons Collection |
| 10388 | Trinity College Dublin, Manuscripts and Archives Department | TCDMs7624/1-14 | 1703-1900 | Case papers, including powers of attorney and marria... | Arran Papers |
| 10456 | Trinity College Dublin, Manuscripts and Archives Department | TCDMs6874 | 1900-1902 | Correspondence of John Dillon and Elizabeth Dillon, ... | Dillon Papers |
| 10473 | Trinity College Dublin, Manuscripts and Archives Department | TCD Ms 6895 | 1872-1900 | Correspondence of Mrs Anne Deane, miscellaneous resi... | Dillon Papers |
| 11135 | Trinity College Dublin, Manuscripts and Archives Department | TCDMs5025 | 1900-1905 | Cash Book of Robin V O'Brien as agent for the estate... | O'Brien Family |
| 11689 | Trinity College Dublin, Manuscripts and Archives Department | TCDMss5781-5783 | 1853-1900 | Incorporated Society for Promoting Protestant School... | Incorporated Society for Promoting Protestant Schools in Ireland |
| 3682 | UCC Special Collections & Archives | U2/BG-193 | 1900-1906 | Letters of O'Brien to Sophie O'Brien, 1900-1... | William O'Brien Papers |
| 2860 | UCD Archives | P7 | 1900-1970 | This collection includes:Letters to Mulcahy on polit... | Richard Mulcahy Papers |
| 5601 | UCD Archives | TU7 | 1900-1977 | Incorporating records of the National Union of Boot ... | Irish Shoe and Leather Workers' Union |
| 1620 | UCD Special Collections | OL Ms14 | 1900 | A collection of songs and riddles in Irish compiled ... | O'Lochlainn Collection |
| 1622 | UCD Special Collections | Box 5 | 1900 | Notebooks of Henry Morris: Gaelic 1900 Envelope 3 10... | Henry Morris Correspondence |
| 22807 | UCD Special Collections | AOD | 1900-1904 | There are 71 letters in total.6 of these include new... | Annie O'Donnell Letters |
| 8773 | Ulster Museum, Belfast | Zp | c1900-1959 | Collection of c5000 postcards. The following is a s... | Ephemera |
| 13276 | University of Galway Archives | P13 | 1900-1960 | Bound volume containing the Minutes of the General M... | Galway Archaeological and Historical Society |
| 18374 | University of Galway Archives | A30 | c.1900-c.1949 | Material relating to the religious and historical pu... | Dr. Helena C. Concannon Collection |
| 18405 | University of Galway Archives | LE22 | 1900 | A photocopy of the printed genealogy of the family o... | Genealogy of Martin Ballinahinch Castle |
| 23570 | University of Limerick Special Collections and Archives | P2/ | 1900 | 296. Written extract from the United Irishman, 7 Apr... | The Daly Papers |
| 4544 | Waterford City Archives | | 1900-1902 | Visiting Governors' Report Book, 5 April 1900-12 Aug... | Waterford City and County Infirmary |
| 4551 | Waterford City Archives | | 1899-1900 | Annual Report of the County and City Infirmary, 1899... | Waterford City and County Infirmary |
| 4576 | Waterford City Archives | | 1900-1935 | Private Nurses' Account Book, 9 February 1900-March ... | Waterford City and County Infirmary |
| 5548 | Waterford City Archives | C2/ | 1890-1900 | 15: Patrick Street, c1890. Women shopping in shawls.... | Photographic Collections |
| 5549 | Waterford City Archives | LA1/2/A/ | 1874-1900 | Sanitary Authority, Minute Books:1: October 1874-May... | Waterford Corporation Archives |
| 5936 | Waterford City Archives | LA1/13/A/ | 1900-1939 | Public Health Committee, Minute Books:1: 23 August 1... | Records of the Public Health Committee |
| 23326 | Waterford City Archives | P4/ | 1900 | 8: Manuscript letter from Arthur W. Winder, 17 South... | The Penrose Family Collection |
| 9948 | Waterford County Archives | TG/Dungn | 1900-1988 | Committee of Agriculture Minute Books, 28 December 1... | |
| 9951 | Waterford County Archives | RDC/YGHL/21-23 | 1900-1918
1903-1915 | 21 6 November 1900-[1918], File containing letters s... | Youghal Rural District Council |
| 6026 | Westmeath County Archives Department | | 1900-1925 | Ballymore Rural District Council Minute Books:8 Marc... | Ballymore Rural District Council |
| 19939 | Wexford County Archive | | 1900-1902 | Enniscorthy Medical Charities Minute Books:31 Octobe... | |
| 19932 | Wexford County Archive | | 1900-1925 | Minute Books:1. 27 January 1900 - 13 July 19012. 27 ... | Gorey Rural District Council |
| 5880 | Wicklow Library and Archives | | 1900-1994 | Wicklow County Council General Ledger: 31 March 1926... | Wicklow County Council |
| 22799 | Wicklow Library and Archives | | 1900-1919 | Rathdrum Rural District Council Quarterly Minute Boo... | Rathdrum Rural District Council |