Useful links:

Central Catholic Library
Chester Beatty Library
Christ Church Cathedral
Croke Park GAA Museum
Dublinia Museum (Viking and Medieval)
Dublin Chamber of Commerce
Dublin Civic Trust
Dublin Historical Record
Dublin City Library listings and details
Dublin City Library and Archives (Dublin and Irish Collections details)
Dun Laoghaire Rathdown County Council Heritage Officer
Economic and Social history Society of Ireland
Eighteenth Century Ireland
Fingal County Council archives
Four Courts Press
Four Courts Press Maynooth Studies in local history series
Friends of Medieval Dublin
The Garda Síochána Museum and Archives
Glasnevin Cemetery
History Ireland (magazine) online
Institute of Historical Research
Irish Architectural Archive
Irish Film Institute; Irish Film Archive
Irish Genealogical Society; Dublin branch
Irish Georgian Society
Irish History Online
Irish Historical Studies
Irish Historical Society
Irish Historic Town Atlas Project
Irish Labour History Museum
Irish Architecture News, Building and Discussion
Jewish Museum
King’s Inn Library
Land and Registry of Deeds
Little Museum of Dublin
Marsh’s Library
National Gallery of Ireland
National Archives of Ireland
National Library of Ireland
National Museum of Ireland (Dublin branches):
Archaeology (Kildare Street)
Decorative Arts and History (Collins Barracks)
Natural History (Merrion Square)
National Photographic Archive
Number Twenty Nine (Merrion Square- Georgian House Museum)
Pue’s Occurrences
Representative Church Body
Royal Irish Academy
The Society for the Study of Nineteenth Century Ireland
Society of Friends (Quakers) Archive
South Dublin County Council libraries
St Ann’s Church
St. Mary’s Pro Cathedral
St. Patrick’s Cathedral
Temple Bar Cultural Trust
Trinity College Dublin:
Early Printed Books
Long Room Hub
Manuscripts and Archives
University College Dublin:
Urban History Group
Freemasons Ireland