Here are a few for Winnipeg (all photos by me except the one indicated):
Archevêché - Archbishop's Palace (1864), 151, de la Cathédrale Av.
St. Andrew's Church (1849), Parish of St. Andrew's, about 10 miles north of Winnipeg
Woodbine Hotel (1878), 466 Main Street
St. James Church (1853), 525 Tylehurst Street (cr. cpnichols, Flickr)
Grey Nuns' Residence (1846), 494 Taché Av. (now the St. Boniface Museum)