1090 BC—or the Year of the Hyenas, in the reign of Ramesses XI, was a year of catastrophe. There was a very significant drop in the flow of river Nile waters, caused by a spike in climate normality. This led to significant starvation of Egyptians, loss of faith in the religion as conducted by the high priest and collapse not only of the state in Egypt but also its economy, leading to a ten-year period of chaos. This led to the emergence of tomb robbers and the end of the Valley of the Kings as a burial site.
^Ancient Lives: The Story of the Pharaohs' Tombmakers by John Romer Paperback, 256 pages Published October 1st 2003 by Phoenix (first published 1984),ISBN 1842120441 (ISBN13: 9781842120446) edition language English