 The bell tower was constructed in 1661-1662 by Lecce architect Giuseppe Zimbalo at the request of bishop Luigi Pappacoda.It was built to replace the previous Norman bell tower, erected by Goffredo d'Altavilla, which crumbled at the beginning of the 17th century.It has a square shape and appears to be made up of five tapered levels, the last of which is surmounted by an octagonal majolica dome, on which there is an iron statue of Sant'Oronzo.