Amenemhat I was the first ruler of the Twelfth Dynasty (the dynasty that some believe that the Middle Kingdom of Egypt). He reigned since 1991. pr. Kr. to the 1962nd pr. Kr.
[1]. Amenemhet I was not of royal lineage, and he was forced to take measures to ensure that your royal authority, such as literary works (see Oracle Neferti, Amenemhat Instructions) and return the building complex in style pyramid for the rulers of 6th Dynasty. Amenemhat I also moved the capital from Thebes to Itjtawy, and was buried in al-Lisht.
His son Senwosret I followed the example of his father and built the pyramid in Lisht, although this tradition stopped Amenemhat II. Senwosret pyramid is the style closer to 6th dynasty but priramida Amenemhat Amenemhat I. For I and I Senwosret are believed to have ruled jointly (coregency) at least 10 years, and that Amenemhat I celebrated his jubilee (sed festival) one year after the beginning of a joint government.