The atrium of the old palace in Prague castle, is adjacent to st vitus cathedral, is the main part of Prague castle. Old palace on the basis of the original ancient Roman architecture through build and repair, gradually increase the gothic and Renaissance buildings, is a witness the European architectural style of living fossils. Historical background of the old palace was built in the 12th century, until later ruled by habsburgs, here has been the past dynasties of the king of Bohemia.