Every city has a heart. The heart of Prague is the fortress of Prague Castle. Prague Castle - the largest presidential residence in the world, is listed in the Guinness Book of Records, but more importantly, the Prague Castle is listed as a UNESCO World Heritage Site.
Prague Castle was founded in the 9th century, around 880. This huge complex consists of many palaces, temples, castles, cathedrals that are built in different architectural styles, since they were built at different times.