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Clara Thomas Archives & Special Collections

The Clara Thomas Archives and Special Collections collects manuscript, rare book and primary source materials to support research and learning by the university’s faculty, students, and a community of international scholars. We are strong in the areas of Canadian history, fine arts (design, photography, music, film, theatre), philosophy, environmental history, and sexual diversity. We welcome all researchers and visitors; however, a visit to the Clara Thomas Archives and Special Collections (CTASC) is a different experience from visiting another department or section of the library.

Archive Hours

Clara Thomas Archives and Special Collections

Aug 02
Closed Civic Holiday
Aug 03
Aug 04
Aug 05
Aug 06
Aug 07
Aug 08

See more hours

Visiting CTASC

The reading room of the Clara Thomas Archives & Special Collections is closed since 14 January 2021 due to the lockdown ordered by the government of Ontario, but exceptions are being made for researchers with exceptional needs. If your research is of an urgent nature, please contact us by email at:

About Clara Thomas

Professor Clara Thomas was the long-time friend and champion of Archives and Special Collections. Read more about Professor Thomas here.

Ask & Services

We’re online to help you with all your research needs and questions. Just ask!

What to Expect

Archival research can be a (rewarding) challenge! Learn more about what to expect when you visit us.


Want to use a historical photo? Photocopy a pamphlet? Donate to the archives? Find out more…

Curriculum Support

Book a class visit or integrate primary sources into your lectures and assignments.

Research & Learn

Connect with our library resources and services to get the help you need.

Our Holdings

Discover all the unique primary sources, archives, rare, unique and ephemeral material held by York.

Research Tutorial

Not sure how to start your research in the archives? Try our tutorial!

Research Assistance

Need funding to visit us? See how the archives can support your research…

Pushing Buttons, Pushing Stories exhibit features materials from the Jean Augustine fonds