Prague Castle largest historic castle

Prague Castle (Czech: Pražský hrad) is a fortified castle in Prague where the kings of Bohemia,
the Holy Roman Emperors and the presidents of Czechoslovakia and the Czech Republic have
and have had their residence. It stands on a marked ridge on the west side of the Vltava River i
n the Hradčany district.

According to the Guinness Book of Records, the castle should be the largest historic castle,
570 meters long and an average of 130 meters wide.