Cardinal Marcello Lante wanted the church of San Pietro sopra le acque to be restored in 1608. It is, however, very old, actually the first news about it dates back to 1275. Remarkable are the wooden choir in the apse, the Baroch architectures of the inside and the plain façade. The porch is adorned with frescos from the 17th century Of geat value is a painting from the early 15thcentury which represents the Madonna with Child and St Peter . In the inside are several works by Andrea Polinori: the Vocazione of Pietro and Andrea (photographs: 5, 6); St Francis and St Anthony from Padua; St Francis receiving the stigmata.