What was in a royal tomb?
From the end of Dynasty 5 onward, religious texts were inscribed in the burial chambers of royal tombs.
The reasons New Kingdom kings chose the East Valley of the Kings for their burials are unclear.
At the end of the New Kingdom, Egypt entered a period of political and economic decline.
Weeks, Kent R. Measurements of KV Royal Tomb Components. In: Richard H. Wilkinson and Kent R. Weeks (eds.). The Oxford Handbook of the Valley of the Kings. Oxford: Oxford University Press, 2016. Pp. 583-599.