It has also been known as the Royal County of Berkshire since at least the 19th century because of the presence of Windsor Castle and was recognised as such by the Queen in 1957 and letters patent issued in 1974. Berkshire is a county of historic origin and is currently both a ceremonial county and a non-metropolitan county without a county council. It borders the counties of Oxfordshire, Buckinghamshire, Greater London, Surrey, Wiltshire and Hampshire.