The chronology of the ancient Near East is a framework of dates for various events, rulers and dynasties. Historical inscriptions and texts customarily record events in terms of a succession of officials or rulers: "in the year X of king Y". Comparing many records pieces together a relative chronology relating dates in cities over a wide area.
For the 3rd and 2nd millennia BC, this correlation is less certain but the following periods can be distinguished: Early Bronze Age: Following the rise of cuneiform writing in the preceding Uruk period and Jemdet Nasr periods came a series of rulers and dynasties whose existence is based mostly on scant contemporary sources (e.g. En-me-barage-si), combined with archaeological cultures, some of which are considered problematic (e.g.