Collection of photographs related to the history of Greek people in Canada. 

750,000 images in that record the development of CN as a Crown corporation from 1920 onwards

Aerial photos of Ottawa and Gatineau.

A selection of wartime correspondence from the Clara Thomas Archives and Special collections

A collection of recordings, images and documents related to the history of Jazz in Canada.

Photographs taken by  geographer John H. Warkentin.

Aerial photographs collected by Lou Wise.

The digitized holdings of the museums managed by the city of Ottawa.

A collection of material related to the creation of the University of Calgary. 

Archival material related to the activities of Ontario Mennonites and other peace churches during the First World War, including files of the Non-Resistant Relief Organization and the Markham-Waterloo Mennonite Conference, as well as related files in the personal collections of Ontario Mennonite leaders.