Amenemhat I, or Amenenhet I, was the first ruler of the Twelfth Dynasty (the dynasty debated to be the beginning of the Middle Kingdom of Egypt). He ruled from 1991 BC to 1962 BC, which is roughly 30 years. Amenemhet I was not of royal lineage, and hence took measures to assure the authority of his kingship, such as including literary works (the Prophecy of Neferti, Instructions of Amenemhat) and the revertion to the pyramid-style complexes of the 6th Dynasty rulers. Amenemhet was vizier for Mentuhotep IV, and was the best one suited to take his position as pharoah. Amenemhet I also moved the capital from Thebes to Itjtawy and was buried in el-Lisht.