In the collapse of 14th July 1902, the 5 bells were smashed. They were all recast and donated by Pope Pius X.
There had always been five since ancient times and each one had a special name: Marangona was the main bell at whose sound practitioners of the various crafts (marangoni) began and stopped work. This bell also gave first notice of Meetings of the Upper Council and was followed by the peals of the Trottiera, so called because on hearing it the patricians had to hurry to the Ducal Palace, urging their horses to a trot.
Then the Nona which rang midday, the Mezza Terza which announced Senate meetings and the Renghiera or Evil Deed, the smallest, which announced an execution.