In 3500BC, the city of Susa, in what is today Iran, housed about eight thousand people. The city was built between two rivers for protection water access. Susa survived thousands of years, becoming an important center of the Babylonian Empire. It was from here, according to the Bible, that Esther married the Persian emperor saved her people from a plotted genocide. According to the Iliad, the city was founded by Memnon, who later died defending Troy from Greek attack in the Trojan War.