admire with our guide one of the most famous sculptural cycles by michelangelo il crepuscolo laurora il giorno e la notte twilight dawn day night inside the sacrestia nuova new sacristy designed by the great artist discover the inlays of precious polychrome marbles of hard stones and precious gems that cover the walls of the great cappella dei principi princes chapel for which opificio delle pietre dure the factory of hard stones was created especially and is today one of th