Former Rideau Chapel (National Gallery of Canada, Sussex Drive)
 
The chapel of the former Rideau Street Convent is unique in North America. Designed in the Gothic Revival style in the 1880s by architect-priest Georges Bouillon, it has a neo-Gothic fan-vaulted ceiling supported by delicate iron columns.  

The chapel was saved from the wreckerís hammer in 1972. After the Our Lady of the Sacred Heart Convent closed its doors, the chapel was taken apart stone by stone, and each piece numbered. Some 4,000 pieces were kept in Ottawa warehouses until 1988, when the chapel was reassembled in the new National Gallery of Canada. The chapel is exactly as it was formerly, with its three altars and carved wood altar screen.