Sumerian historiographical chronicle (*nam-lugal*, "Kingship"; ETCSL 2.1.1, ~431 lines) compiled during the Ur III and Isin-Larsa periods (most famously preserved on the Weld-Blundell four-sided clay prism written by the scribe Nur-Ninsubur c. 1800 BCE). It traces the single legitimate seat of kingship from the moment "kingship descended from heaven" at Eridu under Alulim, through five antediluvian cities before the Great Flood swept over the land, and down through the post-diluvian dynasties of Kish, Uruk, Ur, Akkad, and Isin.
Alulim (first king at Eridu), Eridu (first seat of kingship), Kish (first post-flood dynasty), Great Flood (chronological dividing line), Societal Structure (institution of kingship)