What was in a royal tomb?
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.
The Valley of the Kings was used for over five hundred years and as more and more tombs were dug there the site became increasingly crowded.
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.