Built in the 17th century to be a mausoleum for Medici family members, nowadays a museum, the chapels includethe New Sacresty, which dates back to 16th century instead.Great evidence of Michelangelo’s genius, the New Sacresty combines dynamic architecture with outstanding sculpture. The square ground plan covered by a half-dome was clearly inspired by the Old Sacresty 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 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.