retold by Manetho, Herodotus, and Diodorus Siculus. Manetho claimed the mythical Sesostris not only subdued the lands as had Senusret I, but also conquered parts of Canaan and had crossed over into Europe to annex Thrace. However, there are no records of the time, either in Egyptian or other contemporary writings that confirm Manetho's additional claims. Amenemhat III Senusret's successor Amenemhat III reaffirmed his predecessor's foreign policy. However, after Amenemhat, the energies of this dynasty were largely spent, and the growing troubles of government were left to the dynasty's last ruler, Sobekneferu, to resolve. Amenemhat was remembered for the mortuary temple at Hawara that he built, known to Herodotus, Diodorus, and Strabo as the "Labyrinth". Additionally, under his reign, the marshy Fayyum was first exploited. Amenemhat IV Amenemhat IV succeeded his father, Amenemhat III, and ruled for approximately nine years. Sobekneferu Sobekneferu, a daughter of Amenemhat III, was left with the unresolved governmental issues that are noted as arising during her father's reign when she succeeded Amenemhat IV, thought to be her brother, half brother, or step brother. Upon his death, she became the heir to the throne because her older sister, Neferuptah, who would have been the next in line to rule, died at an early age. Sobekneferu was the last king of the twelfth dynasty. There is no record of her having an heir. She also had a relatively short reign and the next dynasty began with a shift in succession, possibly to unrelated heirs of Amenemhat IV. Ancient Egyptian literature refined It was during the twelfth dynasty that Ancient Egyptian literature was refined. Perhaps the best known work from this period is The Story of Sinuhe, of which several hundred papyrus copies have been recovered. Also written during this dynasty were a number of didactic works, such as the Instructions of Amenemhat and The Tale of the Eloquent Peasant. Also, the kings of dynasties twelve through eighteen are credited with preserving for posterity some of the most remarkable Egyptian papyri that have survived to today: 1900 BC – Prisse Papyrus 1800 BC – Berlin Papyrus 1800 BC – Moscow Mathematical Papyrus 1650 BC – Rhind Mathematical Papyrus 1600 BC – Edwin Smith papyrus 1550 BC – Ebers papyrus See also Execration texts History of Ancient Egypt Twelfth Dynasty of Egypt family tree References States and territories established in the 20th century BC States and territories disestablished in