Sesostris I definition of Sesostris I in the Free Online Encyclopedia.

Sesostris I (sĭsŏs`trĭs), d. 1926 B.C., king of ancient Egypt, 2d ruler of the XII dynasty; son and successor of Amenemhet I Amenemhet II, d. 1903 B.C., son and successor of Sesostris I, was coregent with his father (1938–1935 B.C.), then sole ruler (1935–1906 B.C.), finally coregent with his son and successor, Sesostris II (see under Sesostris I ). He reopened the mines of Sinai.
..... Click the link for more information. . 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. Sesostris' son and successor, Amenemhet II (see under Amenemhet I), was his coregent during the last three years of his reign.

Sesostris II, d. 1878 B.C., was the son of Amenemhet II, first his coregent (1900 B.C.), then his successor (1897–1878).

Sesostris III, d. 1840 B.C., succeeded (1878 B.C.) his father Sesostris II. He fixed the southern boundary of Egypt above the Second Cataract of the Nile Nile, longest river in the world, c.4,160 mi (6,695 km) long from its remotest headstream, the Luvironza River in Burundi, central Africa, to its delta on the Mediterranean Sea, NE Egypt. The Nile flows northward and drains c.
..... Click the link for more information. not far from Wadi Halfa and curbed the power of the Egyptian nobles.

Sesostris I

20th century bc, king of Egypt of the 12th dynasty. He conquered Nubia and brought ancient Egypt to the height of its prosperity. The funerary complex at Lisht was built during his reign