Chapel of the Princes at the San Lorenzo Church in Florence, by Nigetti Matteo, Giovanni de' Medici, 1604, 17th Century, dark marble, semi, precious stones, mother, of, pearl, lapis lazuli and coral. Italy: Tuscany: Florence: San Lorenzo Basilica: Chapel of the Princes. Interior view Chapel of the Princes San Lorenzo church Florence octagonal dome marble inlay work dramatic effect wainscot coats-of-arms of the 16 towns of the Medici family niches atrium altar sarcophaghi hidden rooms crypts