The history of this period is still poorly known, and the use by some historians of later literary narratives concerning legendary rulers of that period, such as Gilgamesh, who allegedly reigned in Uruk around 2,600 BCE, is questionllble. Likewise, historians long have misguidedly relied on the Sumerian Kinglist, whose partisan character is well established. It offers a warped vision of history, enumerating the cities where kingship "resided" after it "came down from heaven."