Taufbecken
Only one of the sides has been furnished with green and white marble. The Romanesque Portal has been attributed to a follower of Nicola Pisano. The 16th-century altar inside has been assigned to Balsimelli da Settignano, using a design by Mino da Fiesole. It has a painting (partially damaged during World War Two of the "Assumption" of the Virgin by Niccolò Circignani. Beside that altar is a marble font (1502) is by Andrea Sansovino. The Ciborium (1471) was completed by Mino da Fiesole. The Baptismal font (1759) by Giovanni Vaccà. Above it rises a statue of "St John the Baptist" (1771) by . The holy water receptacle is an ancient Roman sarcophagus.