Located in the Prague Castle , St. Vitus Cathedral is an imposing building in the French Gothic style . It is the largest cathedral in Prague and the importance of incorporating several chapels , frescoes and graves . The rich and beautiful chapel contains the tomb is decorated St. Wenceslas . It is a symbol of the Czech Republic. The first church dedicated to St. Vitus whole , which stood on the site of the present cathedral was a Romanesque rotunda , built by Wenceslaus I, Duke of Bohemia in 925. This patron saint was chosen because Wenceslaus he got from King Henry I , part of the relics of the saint - his arm . Besides religious ceremonies , and ceremonies officiated here ...