The history of St. John in the Valley (San Giovanni in Valle) is the history of three churches: the crypt goes back to the V-VI century and was built over an ancient early Christian cemetery; the second church was built by the Lombards in the VI-VII centuries and was destroyed by the earthquake of 1117; the current present day church dates from 1120 and was rebuilt over the ruins of the previous church. It was a baptismal parish with an archpriest and a “college” of friars. In Romanesque style, with the façade and sides in tuff, three naves and three apses, the crypt and raised presbytery, the church was consecrated by the Bishop Ognibene in 1164. The façade has simple lines, with small arches on top, a double lancet window and lateral windows; the door is square and made from reed marble. It dates from the beginning of the XV century. Above the door there is a noteworthy prostyle.
On the right side of the church there is a surviving wall of a beautiful Romanesque cloister and square bell tower, which is Romanesque on the lower part and eighteenth century on the upper part.
Adjacent to the wall of the church and college, there are stems, plaques and sepulchre seals. Inside, the baroque altars of the lower church and the central altar of the upper church are worthy of attention, along with the renaissance baptistery and a St. John, by D. Brusasorzi.