The church of San Salvatore is located in Usigni, in Fontevecchia, a small and gracious centre which dominates the Tissino valley.

The Church of San Salvatore, external to the built-up area, with the size and elegance of its shapes, reflects the lustre and power of the person who commissioned the work: Cardinal Fausto Poli, private secretary to Pope Urban 8th and devoted to Saint Rita of Cascia, of whom he promoted the beatification.

Completed in 1644, it takes the name of the old parish church which was in Fontevecchia. The two order façade was executed according to the drawing of Bernini, with tympanum (dominated by the coat of arms of Urbano Vili) and curvilinear connections.

Inside, a single nave with lateral chapels according to Roman usage. A particularity of this interior is that the altar pieces were all frescoed, in the years around 1650, as requested by Cardinal Poli, who used painters of the school of Pietro da Cortona. In the small chapel, the entrance features the Stigmata of St. Francis and the Madonna and St. Francis in the lunettes, by Salvi Castellucci.