During the 19th century, as private leases ran out on residential buildings, ownership reverted to the Crown, which began to use them as public offices. The name "Whitehall" is now used as a metonym to refer to that part of the civil service which is involved in the government of the United Kingdom. The street's central portion is dominated by military buildings, including the Ministry of Defence, with the former headquarters of the British Army and Royal Navy, the Royal United Services Institute, the Horse Guards building and the Admiralty, on the opposite side. Government buildings on Whitehall, from north to south, include The Admiralty Buildings, the Department for International Development at No. 22, the Department of Energy and Climate Change at No. 55, the Old War Office, the Office of the Parliamentary Counsel at No. 36, the Horse Guards, the Ministry of Defence Main Building, Dover House (containing the Scotland Office), Gwydyr House (containing the Wales Office), the Cabinet Office at No. 70, the Foreign and Commonwealth Office and the Government Offices Great George Street (HM Treasury, HM Revenue and Customs and parts of the Cabinet Office).