Look at Aida and Nine Readings by Ralph P. Locke, you'll find the article in the 2006 edition of Nineteenth Century Music Reviews. He gives views on the answer to this question. I think it is quite correct but maybe a little biased as Verdi is an Italian patriot and in the opera, ancient Egypt is analogic to Austro-Hungary and Napoleonic France, two imperial countries that took over Italy ( which can be compared to the Ethiopia in 'Aida').
Aida was captured as a Nubian slave and Radames ( and Egyptian captain) gave her to Amneris as a gift.
hermes
The priests played an important role in the Aztec Civilization because they brought the religion to the Aztecs and so they had believed that the priest are the only people who could speak to their gods of their belief and so that means that or i am not to sure about this but it could also be that they believed the priests were living gods. Either one is grammatically correct and historically correct.
opera
The 3 historically accurate articles describing three events are Cao Wei (220-265), Shu Han (221-263), and Eastern Wu (222-280).
Aida, an Ethiopian princess, in the opera of that name.
It is Radames the captain of the guards in the Opera Aida
because aida is a sung ^^
verdi
Aida
Aida
Egypt.
It premiered in Cairo.
Aida the slave, Radames her lover, Amneris Egyptian princess,
Celeste Aida
Aida, by Verdi.
The answer to that question is Aida.