Booty from the Crusades fill the Basilica di San Marco's treasury, including a 10th-century rock-crystal ewer with winged feet made for Fatimid Caliph al-'Aziz-bi-llah. Don't miss the bejewelled 12th-century Archangel Michael icon, featuring tiny, feisty enamelled saints. Doges' remains are preserved alongside alleged saints' relics, including St Mark's thumb, the arm St George used to slay the dragon and even a lock of the Madonna's hair.