13th-century Franciscan church was used by Hungarian speakers. Under Turkish rule, this was the only church allowed to remain Christian: all others were converted into mosques. During the Allied Siege of Budapest of 1944 several bombs hit the building. However, the real destruction of the Church was not by the war but the "restoration" of the 1950s: the church building was demolished by the anti-church communist regime. Only its bell tower and the side chapels escaped from the destruction. Only one stone window has been rebuilt as a memento. Today the tower is used as an observation tower. There is a 24-bell chime in the tower.