Churchill War Rooms -  The Churchill War Rooms is a museum in London and one of the five branches of the Imperial War Museum. The museum comprises the Cabinet War Rooms a historic underground complex that housed a British government command centre throughout the Second World War and the Churchill Museum a biographical museum exploring the life of British statesman Winston Churchill.Construction of the Cabinet War Rooms located beneath the Treasury building in the Whitehall area of Westminster began in 1938. Given a choice of categories company, educational institution, artist, athlete, office holder, mean of transportation, building, natural place, village, animal, plant, album, film or written work, the text refers to which one?
A:
Building