At the northeastern slope of poggio di Montieri, stands the Church complex of the Rectory of San Niccolò, comprising a series of buildings laid out inside of a wide plateau near the ditch of the rectory.
The site is known from documents written starting from 1133 but excavation, still in progress, demonstrated the existence of a church dating back to an earlier period. In the 12th century, the complex underwent a major restructuring with the construction of a church in esapetala plant (which is equipped with six apses, unique example in Tuscany) and some buildings built around a central space. It is also at this time that you build a large industrial area in the northern part. In this construction phase belong the furnishings and decorations of exquisite workmanship. In the 13th century the complex undergoes slight changes with the construction of some rooms and a courtyard in the middle. The entire complex is abandoned at the end of the 13th century.