The Library of Congress (Washington, DC) is described as "the largest library in the world." It provides a Prints & Photographs Online Catalog.
The City of Toronto Archives is located at 255 Spadina Road, Toronto.
"The Archives has over 1.25 million photographs and over 10,000 maps in it collection. Many of these have been digitized and made available to view online." Your can browse some of the collection online or search City of Toronto Archives database.
The Toronto Public Library has an exception local history collection with some content online. Also, the Urban Affairs Collection in the Toronto Reference Library has a great selection of Toronto-related urban resources.
Located on the 4th floor of the UTM Library, the UTM Archives holds records and artifacts dating from the establishment of the campus in 1967. Archives staff will help you locate the materials you need but please book your appointment using the online form.