Saint Joseph's Oratory

Saint Joseph's Oratory of Mount Royal is a Roman Catholic minor basilica and national shrine located at 3800 Queen Mary Road in the Côte-des-Neiges neighborhood on Mount Royal's Westmount Summit in Montreal, Quebec. It is a National Historic Site of Canada and is Canada's largest church, with one of the largest church domes in the world. Founded in 1904 by Saint André Bessette in honour of his patron saint, Saint Joseph, the Oratory is the product of numerous architects and thousands of workers in a process spanning six decades.

Source: Wikipedia