Diocletian and the Tetrarchy (ca. 280-312)
Constantine I and his successors (312-ca. 400)
Christianization (fifth century)
Restoration of the empire (sixth century)
Transformation (seventh and eighth centuries)
Renewal (ninth and tenth centuries)
Between East and West (ca. 1000- ca.1250)
Period of turmoil (ca. 1250-ca. 1450)
The new order (ca. 1450-ca. 1550).
