"The Third Intermediate Period of Ancient Egypt began with the death of Pharaoh Ramesses XI in 1070 BC, which ended the New Kingdom, and was eventually followed ...
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by the Late Period. Various points are offered as the beginning for the latter era, though it is most often regarded as dating from the foundation of the Twenty-Sixth Dynasty by Psamtik I in 664 BC, following the expulsion of the Nubian Kushite rulers of the Twenty-fifth Dynasty by the Assyrians under King Assurbanipal. The concept of a "Third Intermediate Period" was coined in 1978 by British Egyptologist Kenneth Kitchen." - (en.wikipedia.org 01.08.2020)