that was the end of ancient egypt actually basically it all ended when the ptolemy and romans invaded and then after that it was all invasion after invasion no self rule for 2500 years until really really recently in 1954 where egyptians got self rule on their country again from the last british invasion

and idk if i can call it a mix of cultures since the nile valley has always been mostly egyptians with only a minority of foreigners that came to live there even if there was invasions it was only the ruling class that changed so