The First Intermediate Period is dated c. 2160–2055 BCE and spans the Ninth Dynasty to the middle of the Eleventh.
Scholarly note: Some scholars place the Seventh and Eighth Dynasties at the start of this period; Shaw places them at the end of the Old Kingdom.
- Ian Shaw (ed.) (2000) “The Oxford History of Ancient Egypt” Oxford University Press, Chronology; S. Seidlmayer, “The First Intermediate Period”