The earliest drawings in the Archive’s collections are designs of the 1690s for a magazine in St. John’s Castle, Limerick. The drawings collections range in size from single items to entire corpora of drawings from individual architectural practices, and include drawings in every kind of medium used by architects over the past 400 years. Most of Ireland’s great architects, and most of the great architects who have worked in Ireland, are represented in the drawings collections, including Richard Castle, Deane and Woodward James Gandon, Alan Hope, Francis Johnston, Raymond McGrath, Richard and William Vitruvius Morrison, and Michael Scott.

Major collections include:
Ashlin & Coleman Collection (76/1)
Boyd Barrett Murphy O’Connor Collection (95/148)
Aodhagán Brioscú Collection (2003/71)
Buchan Kane Foley Collection (2000/12)
Burgage Collection (78/36)
R.M. Butler Collection Charleville Castle Collection (86/24)
Alfred Cochrane Collection (2000)
Coolmore Collection (82/59)
County of Cork Club House Collection (81/85)
T.J. Cullen Collection (85/62 and 2000/40)
Emo Court Collection (91/101)
Desmond FitzGerald Collection (99/21)
Dunphy O’Connor Baird Collection (2000/164)
J. Desmond Featherstone Collection (2002/74)
Forenaughts Collection (80/33)
Charles Geoghegan Collection (80/32)
Guinness Collection (96/68)
Alan Hope Collection (86/127)
Inis Gibson Collection (85/45)
Brendan Jeffers Collection (92/34)
W.A. Johnston Collection (2000/104)
Jones & Kelly Collection (88/62)
Simon J. Kelly Collection (2000/136)
McCurdy & Mitchell Collection (79/17)
Raymond McGrath Collection (78/30)
Noel Moffett Collection (98/48)
Niall Montgomery & Partners Collection (2001/73)
Brendan Morris Collection (2000/168)
Munden & Purcell Collection (85/141)
Brian O’Carroll Collection (96/95)
Brendan O’Connor Collection (86/126)
Donal O’Neill Flanagan Collection (92/23)
Ormonde Collection (77/9)
Aidan Powell Collection (2004/4)
Powerscourt Albums (89/62)
Anthony Reddy & Associates Collection (97/45)
RIAI Murray Collection (92/46)
Robinson Keefe & Devane Collection (86/93)
Frederick Rogerson Collection (98/7)
Patrick Rooney & Associates Collection (95/73)
Royal Barracks Collection (94/5)
Michael Scott Collection (89/44)
Scott Tallon Walker Collection (80/21)
Sibthorpe Collection (78/22)
Sligo Lunatic Asylum Collection (89/11)
Stephenson Gibney Collection (89/24)
Townley Hall Collection (85/156)
Tyndall Hogan Hurley Collection (98/61)
Workhouse Drawings Collection (85/138)