The Medici Chapels are a part of San Lorenzo basilica that was considered the private church of Medici family. The chapels are constituted by several different rooms: the “New Sacristy” famous all over the world; Michelangelo started its realization in 1526, the chapel contains masterpieces of architecture an sculpture, the tombs of san Lorenzo and Giuliano dei medici. The Museum of the Medici Chapels consists also of the “Chapel of the Princes”, build at the beginning of 1600 as a mausoleum of Medici family. It is a huge building with an octagonal plan surmounted by a large dome, that, for its height, comes after the cathedral; the dome is internally covered by polychrome marbles and holds the tombs of Gran Dukes.