 The Nri kingdom is considered to be a center of Igbo culture. Nri and Aguleri, where the Umueri-Igbo creation myth originates, are in the territory of the Umu-Eri clan, who trace their lineages back to the patriarchal king-figure, Eri. Eri's origins are unclear, though he has been described as a "sky being" sent by Chukwu (God). He is credited with first giving societal order to the people of Anambra. Nri history may be divided into six main periods: the pre-Eri period (before 948 CE), the Eri period (948 — 1041 CE), migration and unification (1042 — 1252 CE), the heyday of Nri hegemony (1253 — 1679 CE), hegemony decline and collapse (1677 — 1936 CE) and the Socio-culture Revival (1974 — Present).
