medieval History 400 - 717 By rdm Period: 395 to 395 division por Teodosio Period: 395 to 525 Imperio Oriental Period: 500 to 623 Estados preislamicos Ghassanies, Lajmies Himayries Period: 527 to 564 Justiniano Period: 610 to 717 Heracliana Period: 632 to 661 Califas Ortodoxos Abu Bakr 632 - 634 Umar 634 - 644 Utman 644 - 656 Alkí 656 - 661