Amenemhet I(ä'mĕnĕm`hĕt, ā'–), d. 1970 B.C., king of ancient Egypt, founder of the XII dynasty. The son of a powerful Theban family, he seized the kingship c.2000 B.C. The XII dynasty ushered in the Middle Kingdom of Egypt; the subsequent dynasty of pharaohs named Amenemhet or Sesostris maintained peace throughout their hegemony, thus enabling the arts and sciences to flourish as they never would again in Egypt. Amenemhet I centralized the government and subjected the long-powerful nobles to a virtually feudal state. His son and successor, Sesostris ISesostris I
, d. 1926 B.C., king of ancient Egypt, 2d ruler of the XII dynasty; son and successor of Amenemhet I. He was coregent with his father from 1980 B.C.; from 1971 to 1926 he was sole ruler. His reign was notable for successful campaigns in Nubia.
..... Click the link for more information. was coregent from 1980 B.C.