Office of the Prime Minister and Privy Council

Office of the Prime Minister and Privy Council
The building seen from Wellington Street in 2010
Former names	Southwest Departmental Building, Langevin Block
General information
Type	Office building
Architectural style	Second Empire
Address	80 Wellington Street
Town or city	Ottawa, Ontario
Country	Canada
Current tenants	Office of the Prime Minister Privy Council Office
Construction started	1884
Completed	1889
Owner	The King in Right of Canada
Landlord	National Capital Commission
Design and construction
Architect(s)	Thomas Fuller
Designations	Classified Federal Heritage Building
National Historic Site of Canada
Official name	Langevin Block National Historic Site of Canada
Part of	Confederation Square National Historic Site of Canada

The Office of the Prime Minister and Privy Council (French: Bureau du Premier ministre et du Conseil privé) building, formerly known as the Langevin Block (French: Édifice Langevin, IPA: [lɑ̃ʒvɛ̃]), is an office building facing Parliament Hill in Ottawa, Ontario, Canada. As the home of the Privy Council Office and Office of the Prime Minister, it is the working headquarters of the executive branch of the Canadian government.

The term Langevin Block was previously used as a metonym for the Prime Minister's Office and the Privy Council Office. The building was named after Father of Confederation and cabinet minister Hector-Louis Langevin.^[1] Following objections by Indigenous people of the use of Hector Langevin's name, due to allegations regarding Langevin's role in establishing the residential school system associated with the abuse of Indigenous children and attempts to forcibly assimilate them, Prime Minister Justin Trudeau announced the renaming of the building on June 21, 2017.^[2]

The building is a National Historic Site of Canada.^[3]