History and and bit of back ground to visit Iran
Iran is home to one of the world’s oldest civilizations, beginning with the formation of the Elamite kingdoms in the fourth millennium BC. It was first unified by the Medes in the seventh century BC and reached its territorial height in the sixth century BC, when Cyrus the Great founded the Achaemenid Empire, one of the largest empires in history. Alexander the Great conquered the realm in the fourth century BC and it was subsequently divided into several Hellenistic states. An Iranian rebellion established the Parthian Empire in the third century BC, which was succeeded in the third century AD by the Sassanid Empire, a major world power for the next four centuries. Arab Muslims conquered the empire in the seventh century AD, leading to its Islamization; Iran thereafter became a major center of Islamic culture and learning, with its art, literature, philosophy, and architecture spreading across the Muslim world and beyond during the Islamic Golden Age. Over the next two centuries, a series of native Iranian Muslim dynasties emerged before the Seljuk Turks and the Mongols conquered the region.