Hello! My website is all about Kingdom of Kush. Kingdom of Kush was around for 1400 it started around 1070 B.C.E. and ended around 350 C.E.
Structures like this were for burial sites for the Egyptian gods. Kush would worship these gods from Egypt.
Sources
https://www.girlmuseum.org/the-kushite-queens/
https://www.ducksters.com/searchducksters.php?q=of+kindom+of+kush
https://www.worldhistory.org/Kush/
https://www.britannica.com/place/Sudan/The-kingdom-of-Kush
https://africa.mrdonn.org/kush.htm
https://smarthistory.org/