From 550 BCE.
Persia's absorption of Media and then conquest of the Babylonian Empire.
The Persian empire was established by Cyrus the Great in 6th century BC
Persia's conquest and absorption of the Babylonian Empire. Persia's takeover of the Lydian Empire.
Alexander the Great invaded and conquered the Persian Empire in the year 334BC
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.
550 b.C.
Nowruz.
From 550 BCE, reaching its peak over the next 50 years.
Roman Empire, Greek Empire, and Persian Empire
Around 550 BCE.
550 to 331 BCE.
550-330 BC