| 14281 | Alexandra College | | 1899-1900 | File relating to Building and Extension, 1899-1900:R... | |
| 13266 | Armagh County Museum | 1985/4 | 1899 | Oil portrait of Harriette McCrum by H.R. Douglas, 18... | |
| 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 |
| 16215 | Birr Castle Archives | A-W | 1900 | M/30: Letters and papers regarding the marriage sett... | The Rosse Papers |
| 6079 | Clare County Archives | | 1899-1900 | Clare County Council, Minute Book, 22 April 1899 - 1... | Clare County Council |
| 20764 | Cork Public Museum | AQNOL1970:44/ | 1899
1901 | 2 Routine matters, containing correspondence, notice... | |
| 528 | County Museum, Dundalk | Lot 208 | 1900 | Woman standing outside a hotel, Clanbrassil Street, ... | Photographs |
| 7574 | Down County Museum | DB496 | 1900 | Printed programme of a Union Jack Concert held in ai... | |
| 20499 | Dublin City Library and Archive | | 1899
1908-1915 | Electoral Rolls Database: 1899, 1908-1915 | Dublin City Electoral Lists Database |
| 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 |
| 18521 | Dublin Diocesan Archives (RC) | AB6 (File 371/1-8) | 1899 | Manuscript annual report of the Mission of the Littl... | Walsh Papers |
| 23156 | Fermanagh County Museum, Enniskillen Castle | FCM-1980-110 | 1900 | A collection of photographs by Annie King in an albu... | Annie King Papers |
| 21773 | Kerry Diocesan Archives (RC) | C12/23-29 | 1900 | J.G. Eager, Milltown, 1900, Fr Carmody, abuses in pa... | John Coffey, 1889-1904 |
| 3386 | Kilkenny Local Studies Department | RDC159/AA/1 | 1899-1900 | Rough Minute Book:April 1899-March 1900 | Urlingford Rural District Council |
| 3353 | Kilkenny Local Studies Department | RDC57A | 1899-1900 | Minute Books:1. July 1899-October 19002. May 1907-Se... | Castlecomer Rural District Council |
| 13264 | Kilmainham Gaol Museum | 10LG-1C35-7 | 1899 | Memorandum of tenancy agreement between Mrs Henry Ll... | Home Rule |
| 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 |
| 21152 | King's Hospital School | 232-236A | 1900 | 226H Mercer's Rental, 1900. | King's Hospital Records |
| 21704 | Laois Local Studies | | 1899-1900 | Minute Books of the Mountmellick Rural District Coun... | Laois Local Authority Records |
| 5003 | Maynooth University and St Patrick's College, Maynooth | | 1900 | Letter from Una Farrelly to Eoin MacNeill, 1900. | |
| 14534 | Mayo Local History Department | | 1900 | Minute Book, June 1900-September 1900. | Castlebar 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 |
| 3929 | National Archives of Ireland | RHK 6/3 | c.1900 | Benevolent Funds: Dublin Garrison Needlework Associa... | Royal Hospital Kilmainham |
| 3936 | National Archives of Ireland | s20698 | 1899 | Conduct of the daughters of Mr McGillycuddy, Inland ... | Crime Branch Special Records |
| 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 |
| 4789 | National Archives of Ireland | | 1899 | Administration Papers: Secretary of the Board of Cus... | Customs and Excise |
| 8844 | National Archives of Ireland | IB/1/16 | 1900 | Wills and other Testamentary Records: District Regis... | |
| 8849 | National Archives of Ireland | VB/1/68 | 1899 | 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 |
| 11492 | National Archives of Ireland | 1189/13/10 | 1899-1900 | Miscellaneous letters to John Woulfe Flanagan, April... | Woulfe Flanagan |
| 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 |
| 15442 | National Archives of Ireland | 999/13/5 | 1899 | Official copy will and grant of Martha West Heron, D... | Small Private Accessions |
| 15589 | National Archives of Ireland | 999/197/2 | 1900 | High Court of Justice Chancery Co. Cavan Trustees of... | Small Private Accessions |
| 11178 | National Gallery of Ireland Library | AB69 | 1899
1955 | Routine correspondence relating to Evie Hone's death... | |
| 139 | National Library of Ireland | Ms18463 | 1900 | Account by Maura O'Neill Mackey of preparation by Co... | |
| 2305 | National Library of Ireland | Ms1703 | 1899 | Translation made in 1899 by Lord Dufferin and Ava of... | |
| 2500 | National Library of Ireland | Mss10443-10448 | 1900 | Essays by Alice Stopford Green on various Irish topi... | Alice Stopford Green Papers |
| 3498 | National Library of Ireland | Ms10957 | c1900 | A calendar of anniversaries of Irish interest compil... | |
| 3741 | National Library of Ireland | Mss13480-13481 | 1899 | Letters mainly to T P Gill, including, among others,... | 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 |
| 9331 | National Library of Ireland | M 23521 | 1899 | Album relating to the visit of the Duke and Duchess ... | Ormonde Papers |
| 9373 | National Library of Ireland | Ms23998 | c1900 | Maps and lists of tenants of the estates of the Marq... | Ormonde Papers |
| 9771 | National Library of Ireland | Ms18461 | 1900 | Typescript copy of an incomplete letter to Dr Seamus... | |
| 10080 | National Library of Ireland | Ms16168 | c1900 | Newspaper cuttings referring to Lord Edward Fitzgera... | Lord Walter Fitzgearld Papers |
| 10655 | National Library of Ireland | Mss16695-16696 | c1900 | Draft autobiography in manuscript form of J F X O'Br... | |
| 10755 | National Library of Ireland | Ms19933 | 1899-1900 | Minute Book of the Irish Transvaal committee for org... | |
| 10830 | National Library of Ireland | Ms21127 | 1899 | Two letters from Sir R S Ball, one of which is an au... | |
| 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, ... | |
| 11567 | National Photographic Archive | LawrenceR/2215 | c1900 | Ladies bathing place, Portrush Antrim, c1900, includ... | Lawrence |
| 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 | |
| 5511 | Newtown School, Waterford | | 1900 | Parents, Letters to, 1900: Newtown School, Waterford | |
| 5512 | Newtown School, Waterford | 94/507 | 1900 | Prospectus, 1900: Newtown School, Waterford | |
| 18826 | Offaly Archives | OH OHS82 | 1899 | Volume containing abstracts of presentments granted ... | Grand Jury Presentments Lent Assizes |
| 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 |
| 6325 | Public Record Office of Northern Ireland | D/1042/1 | 1899-1900 | Wages book of a hemstitching factory owned by John J... | |
| 7131 | Public Record Office of Northern Ireland | D/2884 | c1900 | Photograph of Queen Victoria in a horse drawn carria... | |
| 7400 | Public Record Office of Northern Ireland | D/3931 | c1900 | Volume of prints and photographs by R Welsh of York ... | |
| 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,... | |
| 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 |
| 6701 | Public Record Office of Northern Ireland | D/1936 | c.1900, c.1930 | Typescript of Gillespie family records, compiled c.1... | |
| 8176 | Public Record Office of Northern Ireland | T/1989/1 | c1900 | Genealogical memorandum concerning the Harris family... | |
| 8186 | Public Record Office of Northern Ireland | T/2017/1 | c1900 | Photograph of the employees of Broadway Damask Compa... | |
| 6783 | Public Record Office of Northern Ireland | D/2231 | c.1900 | This collection includes 6 boxes of Butler family pa... | |
| 7886 | Public Record Office of Northern Ireland | T/1129 | c1900 | A copy of a print of Queen Elizabeth I, no date. A ... | |
| 8045 | Public Record Office of Northern Ireland | T/1591 | c.1900 | Copy of a manuscript draft of a speech attacking ... | |
| 8319 | Public Record Office of Northern Ireland | T/2411/1 | c.1900 | Packet of prints of photographs by Welsh of County D... | |
| 8412 | Public Record Office of Northern Ireland | T/2629 | 1899-c1900 | T/2629/2/5 Genealogical notes on the McRoberts fami... | |
| 1214 | Religious Society of Friends in Ireland Historical Library | P145 | 1900 | Mounted unframed photograph, c1900. Including Susan ... | Photographic Collections |
| 4195 | Religious Society of Friends in Ireland Historical Library | Deed Box VIII/Folder 2:8 | 1899 | Susan Haydock, Violet Bank, Rathagan, County Kildare... | Deeds |
| 5204 | RTÉ Stills Library | 0259/052 | 1900 | Women dressed in traditional Irish clothing in c.190... | Illustration Library |
| 7592 | St Malachy's College, Belfast | E2 | 1898
1900 | One folder which includes:A handwritten diary of Can... | |
| 13265 | Tipperary Museum of Hidden History | AQNO1995.518 | 1899 | Receipts, Cahernahallia estate, Lady Lismore, 1899. | |
| 6448 | Trinity College Dublin, Manuscripts and Archives Department | TCDMs6198 | 1899 | Synge photographs, includes: Photograph of J M Synge... | Synge |
| 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 |
| 10455 | Trinity College Dublin, Manuscripts and Archives Department | TCDMs6873 | 1899 | Correspondence of John Dillon and Elizabeth Dillon, ... | Dillon Papers |
| 3671 | UCC Special Collections & Archives | U2/AZ | 1899 | Letters to Sophie O'Brien by various people from 189... | William O'Brien Papers |
| 3681 | UCC Special Collections & Archives | U2/BF1-94 | 1899 | Letters of O'Brien to Sophie O'Brien, 1899:1... | William O'Brien Papers |
| 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 |
| 18394 | University of Galway Archives | LA5 | 1899 | Photocopy of a file of correspondence maintained by ... | Bawnboy Union, Material relating to the Board of Guardians |
| 18405 | University of Galway Archives | LE22 | 1900 | A photocopy of the printed genealogy of the family o... | Genealogy of Martin Ballinahinch Castle |
| 4551 | Waterford City Archives | | 1899-1900 | Annual Report of the County and City Infirmary, 1899... | Waterford City and County Infirmary |
| 5961 | Waterford City Archives | TNC 10/12 | 1899 | Public Petitions: 1899 . Draft agreement with the Tr... | Records of the Town Clerk |
| 11283 | Waterford County Archives | Box 6 | 1899 | Box of material dealing with the fishing rights and ... | Lismore Castle Papers |
| 19275 | Westmeath County Archives Department | | 1899 | Kilbeggan Rural District Rate Ledger:30 September 18... | Westmeath County Council |