Doors Open Ottawa is an annual event held in the City of Ottawa, Ontario, Canada, that gives the public access to many of the city's unique and historically significant buildings. Among the buildings included are government offices, museums, radio stations, places of worship, embassies, and historical landmarks. It is the second-oldest Doors Open event in North America; after Doors Open Toronto.

Christ Church Cathedral is the Anglican cathedral in Ottawa, Ontario, Canada. The church is located at 414 Sparks Street in the northwest section of the city's downtown at the western end of Sparks Street on top of a promontory looking down to the Ottawa River.