The City of a Hundred Spires, is one of the most beautiful cities in the world, Prague is home to a number of famous cultural attractions, many of which survived the violence and destruction of 20th- century Europe. The main attractions include the Prague Castle, the Charles Bridge, Old Town Square with the Prague astronomical clock, the Jewish Quarter, Petrin Hill and Vysehrad. Since 1992, the extensive historic center of Prague has been included in the UNESCO list of World Heritage Sites. Prague is famous for its cultural life. Wolfgang Amadeus Mozart lived here, and his Prague Symphony and Don Giovanni were first performed in the city. In addition, the lyric music of the great Czech composers Bedrich Smetana, Antonin Dvorak, and Leos Janacek is commemorated each year in a spring music festival.