Original: The Middle Kingdom is the period in the history of ancient Egypt stretching from the establishment of the Eleventh Dynasty to the end of the Fourteenth Dynasty , between 2080 BC and 1640 BC , although some writers include the Thirteenth and Fourteenth dynasties in the Second Intermediate Period .
Simplified: The Middle Kingdom is the period in the history of ancient Egypt stretching from the establishment of the Eleventh Dynasty to the end of the Fourteenth Dynasty , roughly between 2030 BC and 1640 BC .