were cut off from their co-religionists in Iran proper, but they continued to practice the Iranian faith of their forefathers. Strabo, who observed them in the Cappadocian Kingdom in the first century BC, records (XV.3.15) that these "fire kindlers" possessed many "holy places of the Persian Gods", as well as fire temples. Strabo, who wrote during the time of Augustus (), almost three hundred years after the fall of the Achaemenid Persian Empire, records only traces of Persians in western Asia Minor; however, he considered Cappadocia "almost a living part of Persia". The Iranian dominance collapsed in 330 BC following the conquest of the Achaemenid Empire by Alexander the Great, but reemerged shortly after through the establishment of the Parthian Empire in 247 BC, which was founded by a group of ancient Iranian people rising from Parthia. Until the Parthian era, Iranian identity had an ethnic, linguistic, and religious value. However, it did not yet have a political import. The Parthian language, which was used as an official language of the Parthian Empire, left influences on Persian, as well as on the neighboring Armenian language. The Parthian monarchy was succeeded by the Persian dynasty of the Sasanians in 224 AD. By the time of the Sasanian Empire, a national culture that was fully aware of being Iranian took shape, partially motivated by restoration and revival of the wisdom of "the old sages" (). Other aspects of this national culture included the glorification of a great heroic past and an archaizing spirit. Throughout the period, Iranian identity reached its height in every aspect. Middle Persian, which is the immediate ancestor of Modern Persian and a variety of other Iranian dialects, became the official language of the empire and was greatly diffused among Iranians. The Parthians and the Sasanians would also extensively interact with the Romans culturally. The Roman–Persian wars and the Byzantine–Sasanian wars would shape the landscape of Western Asia, Europe, the Caucasus, North Africa, and the Mediterranean Basin for centuries. For a period of over 400 years, the Sasanians and the neighboring Byzantines were recognized as the two leading powers in the world. Cappadocia in Late Antiquity, now well into the Roman era, still retained a significant Iranian character; Stephen Mitchell notes in the Oxford Dictionary of Late Antiquity: "Many inhabitants of Cappadocia were of Persian descent and Iranian fire worship is attested as late as 465". Following the Arab