550 b.C.
Around 550 BCE.
Its control of an empire began in 550 BCE.
The Persian empire was established by Cyrus the Great in 6th century BC
550 BCE to 331 BCE
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The Persian Royal Road began in the city of Susa, which was the capital of the Persian Empire at the time.
Alexander the Great invaded and conquered the Persian Empire in the year 334BC
It lasted 550-331 BCE.
The Greek city-states in Asia Minor revolted against rule by the Persian Empire.
There is not just one Persian Empire. There are several. If you are specifically referring to the Persian Empire of Cyrus the Great, Darius, and Xerxes, that empire was overrun by Alexander the Great between 334-324 B.C.E.
Nowruz.
From 550 BCE.