Stock Photo: Ark of Saint Peter Martyr, by Giovanni di Balduccio, 1336 - 1339, 14th Century, marble, full relief statues, ark bas, relief, high, relief cusp. Italy: Lombardy: Milan: Sant'Eustorgio Church: Portinari Chapel. Whole artwork. Ark of St Peter martyr inside the apse of Portinari chapel caryatides holding ark with reliefs episodes of martyr of St Peter cusp Madonna and Jesus Child niches acroterion