The vault is divided into trapezoidal panels which are separated by delicate white and gold stucco bands of vases and candelabra. Pairs of dainty stucco angels are resting on the edges of the lunettes in the corners. The trapezoidal panels are filled with paintings of the Four Evangelists and an Angel in flight with a laurel wreath in the central medallion. In the three lunettes are paintings of the Sybils, Sybils and Prophets and the Dispute of Saint Jerome. According to the modern critics significant parts of the painted decoration were executed by Mazzoni while others are contributions of his workshop.