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Prague Castle, located on the hills in the Czech Republic. In the 9th century, Prince Prague first built a castle on Vltava Hill. It was here that he began to rule over the people and territories. After centuries of construction, it not only retained many architectural grandeur and historical sites, which remained the site of the Czech Presidency. The Prague Castle has a variety of architectural styles, ranging from ancient Roman foundations to post-modern styles during the war. The style of each era has left little more markers on this castle.