​​​​​​​​​​​​​​​Archives of the Roman Catholic Archdiocese of Toronto​​​

Image of boxes on shelves in ARCAT storage area

Please note as per directives given by the Ontario government concerning COVID-19, the Archives of the Roman Catholic Archdiocese of Toronto is closed until further notice. Staff are working remotely, however access to our physical collections is not possible at this time. 

Office Hours: 

Monday to Friday, 9 a.m. to 5 p.m.

Research by Appointment Only:  

Tuesday to Thursday, 9:30 a.m. to 3:30 p.m.


The Archives of the Roman Catholic Archdiocese of Toronto (ARCAT) collects, preserves and makes available for research the official records of the Archdiocese of Toronto and those ancillary records which reflect the work of the Church within the Archdiocese. ​​

​Under Canon Law, all dioceses are required to maintain an archives. The purpose of preserving records is twofold:

  • First, records need to be kept as evidence of business activity, in order to comply with regulatory and legislative requirements, and to support accountability.

  • Second, records are kept for historical and cultural purposes. The materials preserved by ARCAT serve as an illustration of the life of the Archdiocese. Twenty-first century Catholics are able to feel a connection to the Catholics who came before; the larger community is able to see how the Church helped to shape the Toronto they now know. Stories of yesterday can be a powerful tool for evangelization today.​

​Programs & Services​

As an archives that meets Canadian professional standards, we aim to fulfill the following core functions:

  • acquisition and collection 

  • appraisal and disposal 

  • arrangement and description

  • preservation and storage 

  • reference and access 

  • outreach activities