Two answers required. One of these two powers constructed “the Beauteous Fortress” during a campaign in which Marshal de Boucicaut (“boo-see-COH”) aided the other. One of these empires tried to form an alliance with the Ilkhanate ruler Mahmud Ghazan (-5[1])to fight the other after the Battle of Bapheus. (10[1])Fighting between these two empires (10[1]-5[1])destroyed the Hexamilion (-5[1])wall. (10[2])During an incident between these two empires, one of them refused to follow John Kantakouzenos’s (10[1])orders (10[2])by continuing to settle Gallipoli. (10[1]-5[2])An emperor (10[1])supposedly (-5[2])turned to marble (10[1])after a siege (10[2])between these two (10[1])empires (10[4])that caused (10[1])the fall of the Paleologos (10[1])dynasty. (10[5]-5[1])For (10[1])10 points, (10[1])what two (10[1])empires (10[1])fought each other during the 1453 (10[2])siege (10[1])of (10[2])Constantinople? (10[5])■END■ (10[7]0[1])