The façade is covered with white marble. Over the three portals are
lunettes with scenes of the Life of Christ. On the right transept is another portal with
St. John the Baptist, a 14th-century work by Bonuccio Pardini. The coat of arms on the main façade is a memory of the
Genoese and
Florentine dominations, but there is also one of
Pope Leo X. The marble
rose window is attributed to Riccomanno Riccomanni (14th century). The 36 m-tall
bell tower has square layout, and remains unclad and in brick, originally it was meant be covered with marble facing. It was finished in the late 15th-early 16th centuries by the Florentine architect Donato Benti. In the interior is a curious helicoidal staircase. The baptistery (1786) was originally a 17th-century oratory dedicated to
St. Hyacinth. It contains two baptismal fonts from 1385 and 1612. The Piazza in front of the Cathedral has various monuments including a statue depicting Grand Duke Leopold, the Hapsburg ruler of Tuscany, sculpted by Vincenzo Santini. There is also a marble column of the
Marzocco (The seated lion symbolizing Florence), celebrating the re-acquisition in 1513 of the town by Florence. The fountains on surrounding walls are also known as the Fontana del Marzocco. ==Interior==