Here is what I got not about the artifacts and paintings but Egypt and Nubia relationship: Nubia and Ancient Egypt had periods of both peace and war. It is believed, based on rock art, that Nubian rulers and early Egyptian pharaohs used similar royal symbols. There was often peaceful cultural exchange and cooperation, and marriages between the two did occur.
The syncopated rhythms and improvisation in Blues music attracted new listeners during the Harlem Renaissance. This unique sound meant that no two performances would sound the same. Bessie Smith and Billie Holiday popularized Blues and jazz vocals at this time.