The Tower of London is the oldest castle in London. Its full name is „Her Majesty's Royal Palace and Fortress”. It is over 900 years old and it is situated in the city centre by the River Thames. The oldest part of the castle is called „The White Tower”. A long time ago it was a prison but now it is a museum. Who lives in the Tower? You can meet there guards called "Beefeaters" with their families, clerks, a priest and a doctor. In the museum you can see royal treasures like a golden apple, the royal crowns and the biggest diamond in the world.