Library and Archives Canada collects and preserves the archives of some of Canada’s most notable architects, architectural firms and organizations. These archives contain many interesting collections, for example, records pertaining to the architects, design and construction of Ottawa’s former Dominion Archives building at 330 Sussex Drive.
Public Archives of Canada, Sussex Street, Ottawa, Ontario (MIKAN 3192914)
Early in the first decade of the 20th century, Prime Minister Wilfrid Laurier suggested that the addition of an archives building to the nation’s capital would help “make the City of Ottawa the centre for intellectual development in this country, and the Washington of the North.” The archives building was subsequently constructed between 1904 and 1906, and opened officially in early 1907. This Ottawa landmark housed Canada’s archival heritage until 1967.
See also:
Library and Archives Canada Blog 
I love all of these old historical photos, but why are you not releasing the full original resolution scan of the images? If they belong to all Canadians, and we have the freedom to share and adapt liberally as your copyright notice indicates, than we should have them at full uncompressed resolution. 800 x 1000 is barely good enough to look at on my monitor!