The chapels can be accessed through a 17th-century balustrade in polychrome marble, for which parts of the Renaissance choir were re-used (including crests and cherubims). In the south arm of the transept, the Vinaccesi Chapel houses a notable "Deposition of Christ" from the 13th century. It also has 19th-century frescoes by the Pratese painter Alessandro Franchi. Next is the "Assumption Chapel", which was frescoed in 1435-1436 by the so-called Master of Prato and by a young Paolo Uccello, who painted the "Stories of the Virgin and St. Stephen", completed by Andrea di Giusto in the lower section. They show a bizarre fantasy of enchanted figures caught in a wide range of brilliant colors, and surrounded by Brunelleschi-like architectures. In the main chapel, or chancel, Filippo Lippi and Fra Diamante painted the "Stories of St. Stephen and St. John the Baptist". On the lower north wall are depicted the "Obsequies of St. Stephen", in which Lippi portrayed Pope Pius II, set in a Palaeo-Christian basilica, as an imposing figure in scarlet costume. On the right is the artist's self-portrait. On the opposite wall is "Herod's Banquet", showing a large hall in which Salome is performing her ballet, and the handing over of the head of John the Baptist to Herodias. The altar is by Ferdinando Tacca (1653). The Manassei Chapel was frescoed by a pupil of Agnolo Gaddi in the early 15th century with "Stories of St. Margaret and St. James". The last chapel on the left, the Chapel of the Inghirami, houses a funerary monument attributed to Benedetto da Maiano and a stained glass window from the early 16th century. The Cintola Chapel () is located under the last arch of the north aisle, next to the counter-façade. It houses the "Sacra Cintola" or Girdle of Thomas, the belt which, according to the tradition, was given to Saint Thomas by the Virgin Mary during the Assumption. It was brought to Prato in the 13th century. The chapel has frescoes of "Stories of the Virgin and the Cintola" by Agnolo Gaddi (1392–1395), which are notable for their luminous colors.