The mythical foundation of the church is attributed to the figure of Pertarito, a pretender to the Lombard throne, who saved himself from a conspiracy for the usurpation of the throne, and in 673 erected a female monastery on the site of his escape. At the center of the fresco there is the Virgin, in the act of being crowned by Christ, inserted in a complex architecture, concluded by three niches, of which the central one houses the dove of the Holy Spirit, surmounted by the Eternal Father holding the Crucifix. Six musician angels are arranged symmetrically on the marble base with geometric decorations. Saints Francis and Clare, founders of the order to which the monastery belonged (Franciscan from 1230), represented with their attributes and monastic clothes on the right, and on the left the saints Primo and Feliciano, whose relics were kept in the church. In the triumphal arch, within grotesque frames, the Four Doctors of the Western Church seated at their desks. In 1895 the apsidal fresco was detached and sold clandestinely to George Gray Bernard, an American sculptor and collector, by the Parisian antiquarian Raoul Heilbronner. The fresco arrived in the Philadelphia Museum of Art in 1945 and returned by the latter to the city of Pavia: in 1991 it was generously donated to the Civic Museums and has since been exhibited in the Romanesque and Renaissance Section of our museum