Pieve di S. Andrea di Bigonzo: first mother church of Serravalle, rebuilt in the 14th century in Romanesque-Gothic style. The 15th- and 16th-century frescoes inside are numerous and of great interest. It is a Romanesque building, consecrated in 1303, with a single nave with a pentalobed rose window and a simple gabled roof supported by 12 trusses. The building stands on much older pre-existences, as it is the parish church and therefore the religious matrix of the area, probably present as early as the 6th century with a baptismal font. Inside, the building is rich in works of art and frescoes that narrate popular devotion over the centuries.
