Prague is the capital and largest city of the Czech Republic. Its official name is Hlavní město Praha, meaning Prague, the Capital City. Situated on the River Vltava in central Bohemia, Prague has been the political, cultural, and economic centre of the Czech state for over 1100 years. The city proper is home to more than 1.2 million people, while its metropolitan area is estimated to have a population of over 1.9 million. Prague is widely considered one of the most beautiful cities in Europe with preserved examples from all periods of its history and is among the most visited cities on the continent. Since 1992, the extensive historic centre of Prague has been included in the UNESCO list of World Heritage Sites. According to Guinness World Records, Prague Castle is the largest ancient castle in the world. Nicknames for Prague have included "the mother of cities", "city of a hundred spires" and "the golden city". There are hundreds of concert halls, galleries, cinemas and music clubs in the city. Prague hosts Music Festivals including the Prague Spring International Music Festival, the Prague Autumn International Music Festival and the Prague International Organ Festival. Film Festivals include the Febiofest, the One World and Echoes of the Karlovy Vary International Film Festival. Prague also hosts the Prague Writers Festival, the Prague Fringe Festival, the World Roma Festival as well as hundreds of Vernissages and Fashion Shows.Many films have been made at the Barrandov Studios. Hollywood movies set in Prague include Mission Impossible, Blade II and xXx. Other Czech films shot in Prague include Empties and The Fifth Horseman is Fear. Also, the music video to "Diamonds from Sierra Leone" by Kanye West was shot in Prague, and features shots of the Charles Bridge and the Astronomical Clock, among others.