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  • CHANGE OF HOURS AND SERVICES: Effective Jan 10, 2022, Bronfman and Steacie libraries remain closed and Frost and Scott libraries will be open to currently registered YorkU students, staff, and faculty for study space, photocopiers, course reserves and a limited number of computers. Book a space and please complete YU Screen before coming to campus. Physical resources from all the libraries can continue to be requested through Omni and may be picked up at the Glendon and Keele book lockers. There will be no in-person pickup in the libraries. Please re-new loans online to avoid having to come to campus to return items. For help, please connect to the library's virtual information and research help services or consult the Library Services During Covid 19 guide.

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

Jan 17
Reading Room Closed
Jan 18
Reading Room Closed
Jan 19
Reading Room Closed
Jan 20
Reading Room Closed
Jan 21
Reading Room Closed
Jan 22
Jan 23

See more hours

Research Assistance

•In-person visits to our reading room are suspended until 23 January 2022. This policy will be re-evaluated in the New Year based on the evolving public health situation and we will update this page when we have further information.
•Depending upon the nature of the request, staff may be able to provide online assistance during regular business hours (Monday-Friday, 8:30 a.m.-4:30 p.m.). Please contact us by email at
• We are closed for the York University holiday period, 24 December 2021-5 January 2022

About Clara Thomas

Portrait of Prof. Clara Thomas, York University Libraries, Clara Thomas Archives & Special Collections, Clara Thomas fonds, ASC00524
Portrait of Prof. Clara Thomas, York University Libraries, Clara Thomas Archives & Special Collections, Clara Thomas fonds, ASC00524

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