Art Gallery of Ontario Library & Archives

From the Wikipedia page on the Art Gallery of Ontario

The museum's archives document the history of the Gallery since 1900, and of The Grange house since 1820. Series include exhibition files, publicity scrapbooks (documenting Gallery exhibitions and all other activity), architectural plans, photographs, records of the Gallery School, and correspondence (with art dealers, artists, collectors, and scholars). Because of the regularity with which artists' groups held exhibitions at the Gallery, the archives are a resource for research into the activities of the Group of Seven, the Canadian Group of Painters, the Ontario Society of Artists, and others.

The Art Gallery of Ontario's special collections are one of the most important concentrations of archival material on the visual arts in Canada. In over 150 individual fonds and collections, ranging in date from the early 19th century to the present day, the Special Collections document with primary source material artists, art dealers and collectors, artist-run galleries, and other people and organizations that have shaped the Canadian art world.