[jlogajan]

Also what is now southern Egypt was then part of Nubia. So there were many Nubian royalties in what is now Egypt. Of course we associate most of Egyptian history to the northern part.

[stanz]

There's a good site which discusses ancient Nubia (don't be dismayed by its title, it's legit):

http://www.internetpuppets.org/afrnubia.html

If you scroll down to the time chart, you'll note that Kings from Nubia only ruled Egypt from approx. 800 BC to 650 BC which is considered "late" in ancient Egyptian civilization...much later came rule by the Persians, then later Greece and Rome, but Egypt had seen the last of her glory days by the end of the New Kingdom.