The church of Sant'Ambrogio is in the part of the city having this name. It is an old church rebuilt in the late 13th century.
The interior has pretty Renaissance side altars. It is worth a visit for the Chapel to the left of Sanctuary, called the Cappella del Miracolo that contains a tabernacle by Mino da Fiesole - who is buried here. The frescoes by Cosimo Rosselli are interesting because showing a procession with the chalice in front of the church, it shows faces and scenes of Florence and many of the artist's contemporaries.
Chiesa di Sant'Ambrogio
Via Giosuè Carducci, 1, 50121 Firenze FI, Italia