Pontifex Maximus, hope this helps :)
Answer:
The Arabs Muslims
Explanation:
Arabs Muslims were the ones who started conquering the neighbor’s territories; and within it, were the Byzantine and the Sasanian empires. The Arab Muslim forces took advantage that these territories were weakened by their never-ending fighting with each other. When they conquered the Byzantine and Sasanian territory they started to expand and conquer beyond those lands. The reasons of conquering these lands were majorly political and religious.
Philadelphia received it's name from the Quaker William Penn in 1681.
Music was still underdeveloped due to various reasons. For example, there weren't that many instruments being used and music was mostly conducted vocally, with only a few types of instruments being used from time to time. Technological developments also obstructed this as Polyphony hadn't yet been discovered until later. Another thing was pressure from the church as there was a norm of what music should look like and be like and anyone who came up with the idea of making something differently was ostracized.
