During the 2nd century BCE, the Old City of Jerusalem expanded further onto the so-called Western Hill. This 773-meter-high prominence, which comprises the modern Armenian and Jewish Quarters as well as Mount Zion, was bounded by steep valleys on all sides except for the northern one. The first settlement in this area was about 150 BCE around the time of the Hasmonean kings when what Josephus Flavius named the First Wall was constructed.