The altar surmounted by the altarpiece with Saint Michael the Archangel by Beccafumi holds an urn containing the relics of the Blessed Franco Lippi da Grotti, a Carmelite hermit, renowned for his great austerity of life.
 Franco Lippi was born in the Castle of Grotti near Siena on December 3rd, 1211 by extremely devout parents. Despite their teachings, as a teenager he kept bad company, indulging in gambling and all kinds of vices. He is associated to Sarteano, where his spiritual experience underwent a significant change: in 1229, while he was in the town to fight with the Sienese troops that were defending it from Orvieto’s army, after having lost all his property by gambling with dice he even gambled his eyes, exclaiming: “I will also gamble these to spite who made them” and immediately became blind. But the darkness miraculously lit up his conscience and Franco made a solemn vow to God and Saint James, assuring that if he recovered his sight, he would go on pilgrimage to Santiago. The miracle was accomplished and Franco regained his sight: at first just enough to enable him to tackle the long hike, and later, on his arrival in Santiago, it returned completely. Sincerely converted, on his return from Galicia he went to Rome to plead for papal absolution for his sins; and from sanctuary to sanctuary, from hermitage to hermitage, he visited the holy places of Naples, . . .