The church titled to the patron of Florence and San Giovanni was built, starting in 1312, at the side of Porta S. Andrea, demolished in the early decades of the last century.
The current aspect of the outside is orientate to a dominant classical style. The facade is crowned by a pediment and aportico with three arches on Tuscan columns.
The interior, very simple and bare, is a single rectangular nave with a woody roof. From the major altar of the church comes the Polyptych of Mariotto di Nardo currently preserved in the museum of Basilica.