Skip to main content Skip to local navigation
  • York University Libraries will be closed Victoria Day weekend, Saturday May 18 through Monday May 20. The libraries will re-open Tuesday May 21.

Clara Thomas Archives & Special Collections

The Clara Thomas Archives and Special Collections consist of university records, private papers, rare books, maps and other primary source material acquired to support research and learning by the university’s faculty, students, and a community of international scholars. The holdings 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

May 20
Closed Victoria Day
May 21
appt: email
May 22
appt: email
May 23
appt: email
May 24
appt: email
May 25
May 26

See more hours

Research Assistance

The reading room of the Clara Thomas Archives & Special Collections is open for research visits on the following conditions:

• Access is by appointment only and appointments must be made in advance.
• Appointments are usually available from Monday to Friday, 10:00 am to 4:00 pm.
• Researchers must complete a virtual registration form provided by Archives and Special Collections and submit it by email prior to their first visit.
• Researchers must submit a list of up to six items to be examined during their initial visit. Additional material can be retrieved during visits based on staff availability.
• Researchers are welcome to use digital cameras to take images of our holdings for their personal use and private study.
• Face masks are no longer required to be worn on campus, but we strongly encourage researchers to continue wearing them to help prevent the transmission of COVID-19.

Please contact us at to make an appointment to use our holdings.

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