Alboin the Lombard invades and conquers Italy, [116]
Aleppo, Emirate of, [227];
attacked by Nicephorus Phocas, [231];
tributary to the empire, [270]
Alexander, emperor-regent, [217]
Alexandria, stormed by the Arabs, [166]
Alexius I. (Comnenus), usurpation of, [257];
wars with the Normans, [259];
conquests of in Asia Minor, [205];