King Cyrus the Great established it.
The Medo-Persian Empire
His official home was in the Medo Persian mountains.
The last King of Babylon as the Medo Persian conquered it.
The city of Jerusalem was within the Persian Empire.
About 3,000.
Moses is a legendary figure said to have existed long before the Persian Empire came into existence.
It would depend who is counting them. The Bible mentions four(4): Babylon/Chaldean; Medo-Persian; Greek; Roman. The Roman Empire is thought by some to have 7 revivals until the end-time.
The Persian Empire.
The Persian Empire was not a person.
Only the western portion of India - west from the Indus (todays Pakistan) - was part of the Persian Empire - from 522 BCE. The Persian Empire disintegrated after its occupation by Alexander the Great in 331 BCE.
Persian Empire