Which ancient civilization had the most advance music theory and practice?

Roman Empire did not produce their own music, they adopted it from another civilization.

Which was ancient Greeks main musical instrument?

Which is on of the main musical instrument from ancient India?

Which ancient civilization, created music schools to teach singing and musical instruments performance?

Ancient civilization which music was so important to them, that they created laws to protect it, they used music in every aspect of their lives.

Ancient civilization which had a very strong oral tradition, they passed their music from one generation to the othe orally.

Ancient civlization who believed that their music was a gift from their god.

We do not know that much about this ancient music, because they have a very complex language