Byzantium
________ perpetuated the long- running Roman war with the Persian Empire on a political and military level.
Byzantine Empire
The ________ preserved much of ancient Greek learning and transferred it to the Islamic world as well as the Christian West.
Constantinople
political power remained tightly centralized, with the emperor claiming to rule over all of creation as God's worldly representative, referring to himself as the "peer of the Apostles" and the "single ruler of the universe."
Turkic Ottoman Empire
dubbed the "sword of Islam" at the time, finally seized Constantinople in 1453