The Wawel Cathedral was built in the 14th Century and located inside the walls of Wawel Castle, on Wawel Hill. This is the site of the tombs of Polish royalty, bishops and Poland's patron saint, St. Stanislav, and a select number of Poland's national heroes. The Cathedral also houses a treasury, library, museum, and archives and the famous Sigismund Tower houses the grand bell, older than Big Ben in London, the Sigismund Bell, now only rung on solemn state and church occasions, such as the death of Blessed Pope John Paul II in 2005.