The city now known as Jerusalem has known many wars and had various periods of occupation in its long history. Genesis 14:18, mentions a city called Salem, ruled by King Melchizedek, a "priest of God", which most Jewish commentators believe refers to Jerusalem. According to one Jewish tradition reported by the midrash, it was founded by Abraham's forefathers Shem and Eber, and in the midrash Melchizedek is equated with Shem. The Amarna letters contain correspondence from Abdi-Heba, king of Urusalim (the name of Jerusalem in the Late Bronze Age). At this time his entire kingdom may have had a population of fifteen hundred people, and Urusalim would have been a 'small highlands stronghold' in the fourteenth century BCE with no fortifications or large buildings.