Engineering an Empire (2005)

As much of the world descended into the dark ages after the fall of Rome, one civilization shone brilliantly: the Byzantine Empire. With ruthless might and supreme ingenuity the Byzantines ruled over vast swaths of Europe and Asia for more than a thousand years. The Byzantines constructed the ancient world's longest aqueduct, virtually invincible city walls, a massive stadium, and a colossal domed cathedral that defied the laws of nature