A selection of pictures of the Prague castle and the Hradcany area. Prague's castle, situated on top of a hill west of the Vltava river, is the world's largest ancient castle in the world - 128 meters wide and 570 meters long. The castle dates back to the 9th centuries and was modified and expanded over several centuries. The last works took place in the early 20th century. The Hradcany is the area surrounding the castle.