We don't know accurately - a conservative guesstimate is a population of about 40 million.
Those who established the Persian Empire to its greatest extent were Cyrus the Great, Cambyses II and Darius the Great.
the Persian empire ruled for many centuries. Persians did not tolerate crimes.
20.
The Persian Empire.
The Persian Empire was not a person.
Persian Empire
The Persian Empire absorbed the Babylonian Empire.
Alexander the Great defeated the Persian empire
The Persian Empire absorbed the Baabylonian Empire.
The Persian Empire covered many countries, but was primarily based and organized in the modern state of Iran.
The Persian Empire incorporated the Indus Valley.
Alexander conquered the Persian Empire.