The early Byzantine state. Once the Western Roman Empire fell to Germanic conquerors in 476 CE, the Eastern Empire continued on as what historians would later refer to as the Byzantine Empire. The first truly strong Byzantine Emperor was Justinian—who ruled the Byzantine Empire from 527 CE to 565 CE.
Tenochtitlán was an Aztec city that flourished between A.D. 1325 and 1521. Built on an island on Lake Texcoco, it had a system of canals and causeways that supplied the hundreds of thousands of people who lived there.
