This lecture course examines major architectural developments in the eastern Mediterranean between the 4th and 14th centuries CE. The focus is on the Byzantine Empire, with its capital at Constantinople. Lectures also devoted to related developments in the Caucasus (Armenia and Georgia), early Russia, the Balkans (Bulgaria and Serbia), Sicily and under the Normans, the Crusader states. Parallel developments in early Islamic architecture are used for comparative purposes. The course examines evidence for religious and secular buildings, as well as urbanism and settlement patterns.