Built in the 17th century to be the mausoleum for the Medici family members, nowadays a museum, the chapels include the New Sacristy, which dates back to the 16th century. Great evidence of Michelangelo’s genius, the New Sacristy combines dynamic architecture with outstanding sculptures. The square ground plan covered by a half dome was clearly inspired by the Old Sacristy designed by Brunelleschi as a private burial chapel of the Medicis. Differently from him, though, Michelangelo added a mezzanine below the coffered dome, so that the room looks more dynamic. The absolute purity of the white marble statues, the geometrical grey stone decoration to interrupt and emphasize the walls, were counterbalanced by the colour explosion of the Prince Chapel, decorated with the technique of semi-precious stone mosaics.