The Hermitage of San Magno is an ancient natural cave located on the mountain of the same name, in which - according to a deep-rooted tradition - the Bishop of Trani San Magno took refuge during his escape from the persecutions of Decius.
In fact, it would seem that during his long pilgrimage from Trani to Rome, he stopped at this hermitage which today bears his name, from 220 to 230 AD. Here he would have done the work of catechising the local population, to whom he would have appeared after his death in 251 AD, asking them to build a hermitage in the cave where he had lived.
An image of the Saint, believed to be miraculous, is frescoed on the rock wall and dated 1541.