St. Mary's was originally designed in 1880 by C. Balston Kenway[1] and was updated in 1896 by Samuel Hooper, an English-born stonemason and architect who was later appointed Provincial Architect of Manitoba.[2] The building features elements of Romanesque revival and Germanic architecture.[1]
The Institute for Stained Glass in Canada has documented the stained glass at St. Mary's Cathedral.[3]