Giovanni Giustiniani Longo (Latin: Ioannes Iustinianus Longus, died 1453) was a Genoese captain during the Middle Ages, who led 700 men to the defense of Constantinople against the Ottoman army of Sultan Mehmed II in 1453.
Giovanni Giustiniani Longo (Latin: Ioannes Iustinianus Longus, died 1453) was a Genoese captain during the Middle Ages and protostrator of the Roman empire. He led 700 men to the defense of Constantinople against the Ottoman army of Sultan Mehmed II in 1453.