San Pietro in Monastero, Pre-Romanesque church in Gazzo Veronese, Italy

San Pietro in Monastero, also called Céson, stands near the Tione river in the hamlet of San Pietro in Valle, Gazzo Veronese. The church has a Latin cross plan with a single 19-metre nave and a 17-metre transept, three semicircular apses, and a facade with a bifora and an oculus. The interior was remodelled in 1580, as a painted date on the walls records.

The first certain mention is a 1145 bull of Pope Eugene III, Piae postulatio voluntatis, addressed to Bishop Tebaldo II of Verona, which names a Sancti Petri in Monasterio, though its identification with the Céson is uncertain. Some scholars instead link the church to an 807 record of San Pietro di Moratica, 5 km north. The building was erected in three phases, two for the tower and one for the church, and passed as a Lombard bequest to the Abbey of San Zeno in Verona.

Locals call the church Céson, to tell it apart from the 17th-century parish church also dedicated to Saint Peter. It belonged to the Abbey of San Zeno in Verona, which drew income from the surrounding farmland for several hundred years.

The church stands near the banks of the Tione River, defining its location in the region. Visitors should expect flat terrain and easy external access to view the structure from the outside.

The church was built in three phases: the first two concern the tower, the third the church itself. The tower and church together form a piece of architecture without equal in the lower Veronese plain. A 1510–1514 painting by Francesco Bonsignori in Curtatone shows the building with three apses and a largely collapsed bell tower.