The World's Biggest Stuff
Castle
The largest ancient castle in the world is Prague Castle in Prague. Built in the ninth century, it is an oblong irregular polygon with an average diameter of 420 feet and a total surface area of 18 acres. At times, it has housed the kings of Bohemia as well as Holy Roman emperors and presidents of Czechoslovakia. After Czechoslovakia split into the Czech Republic and Slovakia in 1993, the castle became the seat of the head of state of the new Czech Republic.
