1. The Byzantine Empire

2. Founded by Constantine in 324 on the ancient Greek city of Byzantium. When Theodosius I died in 395 he split the Roman Empire between his two sons: Arcadius would rule the East and Honorius would rule the West. Western Rome would fall in 476. Eastern Rome would last until 1453.

3. The Byzantine Empire by the death of Justinian

4. "When one enters this building to pray, he feels that it is not the work of human power… The soul, lifting itself to the sky, realizes that here God is close by, and that He takes delight in this, His chosen home.” Procopius If Walls Could Talk...

5. Megastructures The Hagia Sophia