The Church is located in the historic center, with the facade on Via Cavour and the right side on Piazza Bertoncini, in front of the Palazzo Comunale (formerly Palazzo dei Priori). Its construction dates back to the century. XIII and dedicated to Saint Peter. The founders’ intention was to replace the four small chapels scattered in the countryside which then disappeared with a parish church in the city. Their names have survived and today designate the districts of the barchini race: San Pietro a Vigesimo, San Martino in Catiana, San Bartolomeo a Paterno and San Michele in Caprugnana. The gradual disappearance of the chapels meant the transfer of their assets to the Church.
The title “St. Peter the Apostle” was in the past widely exploited to gain indulgences from pilgrims who happened to pass along the Via Francigena on their way to Rome to honor the tomb of St. Peter. In 1633, the title of Collegiate Church was added to the title of Propositura, by decree of the Bishop of San Miniato. And it was precisely the Opera della Collegiata that promoted the works for a radical restoration and modernization of the church in the 18th century, based on a project by the architect Giuseppe Broccetti. The Baroque style restorations almost completely hide the original appearance of the interior of the church, while on the outside there are clearer traces of the original construction.
Today the Church has a height of 20 meters and a surface area of 2600 metres, to which are added the 2120 meters of the Chapel of the Blessed Sacrament, which is the former Oratory of San Michele Arcangelo suppressed in 1785 and merged with the Church to increase its the capacity in the mid-nineteenth century. The interior has a single nave, three chapels on the presbytery, raised by three steps compared to the ground floor; two altars on each side of the nave, one in the Chapel of the Blessed Sacrament. The altars are flanked by stucco columns with Corinthian capitals. Above the front doors is the organ, with a carved wooden choir loft. Noteworthy are the two wooden statues of the Annunciation group, attributed to Nino Pisano and Saint Peter in marble. Particularly venerated is a wooden crucifix from the early fifteenth century.