The two bell towers of the Cathedral Church of Mdina contain seven bells, their age ranging over four centuries. Only a single bell has survived from the fourteenth century. This used to hang in the North West tower and is now on display in the Cathedral Museum for better preservation. According to its inscription, it was cast in Venice by the two brothers, Victor and Nicolaus in 1370. Its christened name of Petronilla in honour of St. Peter was only given later, on
August the 7th , 1645 by Bishop Balaguer Camarasa when he consecrated it with two other new bells for the Cathedral church. The second oldest in the cathedral used to hang in the south west tower and was used for the quarter strike of the clock. This fine bell is dated 1499 and was cast by Master Antoninus in Tortoreto on the Adriatic coast in Italy. This bell was replaced by a newer bell, since it has suffered severe damage. The other clock bell was cast at the Foundry of the Order in Valletta in 1616 and is still used for chiming the second quarter of the clock. It carries an effigy of St. Paul and the coat-of- arms of Mdina.