 Among the most important pieces are the sacred bowl () brought by Guglielmo Embriaco after the conquest of Caesarea and supposed to be the chalice used by Christ during the Last Supper; and the Cassa Processionale del Corpus Domini.The cathedral had a fortunate escape on February 9, 1941, when the city was being shelled as part of Operation Grog.Because of a crew error, the British battleship fired a armour-piercing shell into the south-eastern corner of the nave.