The 21st century BC was a century that lasted from the year 2100 BC to 2001 BC. Events [ edit ] Ur-Nammu (seated) bestows governorship on Ḫašḫamer, patesi (high priest) of Iškun- Sin (cylinder seal impression, ca. 2100 BC).

The history of the territories which since ca. 1900 have been known under the name of Nigeria during the pre-colonial period (16th to 18th centuries) was dominated by a number of powerful West African kingdoms or empires, such as the Oyo Empire and the Islamic Kanem-Bornu Empire in the northeast, and the Igbo kingdom of Onitsha in the southeast and various Hausa-Fulani …