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.

[1] Recognizing 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.

[3] It is built of sandstone obtained from a New Brunswick quarry owned by Charles Elijah Fish.

It occupies a prominent place on Ottawa's Wellington Street, adjacent to the National War Memorial, Chateau Laurier, Government Conference Centre, Rideau Canal, National Arts Centre, High Commission of the United Kingdom in Ottawa, and the Sparks Street Mall.

[3] In 2017, the Assembly of First Nations called for the building to be renamed, largely based on Langevin's role in the creation of Canada's controversial Indian residential schools system.