michel-ange - Martyrdom of St Peter (detail). 1546-1550. Fresco. 625 x 662 cm (full fresco). Cappella Paolina, Palazzi Pontifici, Vatican michel-ange - Martyrdom of St Peter (detail). 1546-1550. Fresco. 625 x 662 cm (full fresco). Cappella Paolina, Palazzi Pontifici, Vatican