Bytown Museum

The Bytown Museum (French: Musée Bytown) is a museum in Ottawa located in the Colonel By Valley at the Ottawa Locks of the Rideau Canal on the Ottawa River, just below Parliament Hill. Housed in the Commissariat Building, Ottawa's oldest remaining stone building, the museum provides a comprehensive overview of the origins of Bytown and its development and growth into the present city of Ottawa. Founded in 1917 by the Women's Canadian Historical Society of Ottawa (WCHSO), the Bytown Museum was originally located in the former City Registry Office at 70 Nicholas Street, across from the Carleton County Gaol.

The museum moved to its current location in 1951, and has since operated from the Commissariat Building, with the exception of a brief period from 1982 to 1985, when Parks Canada, the building's landlord, undertook renovations.