The Romans knew as little about Istakhr as the Greeks had done about Persepolis - and this in spite of the fact that for four hundred years the Sassanians maintained relations, friendly or hostile, with the empire.
In this vicinity was situated, at the time of the Christian era, the Parthian city of Spasini-Charax, which was succeeded by Bahman Ardashir (Bamishir) under the Sassanians, and by Moharzi under the Arabs.
The monuments of Persepolis and the coins of the Sassanians show that the religious use of incense was as common in ancient Persia as in Babylonia and Assyria.
An ordinance signed We see this title in its old Persian form, Khshayathiya Khshayathiy, in the cuneiform inscriptions; as Bao-iMwr Bao-nX&ip on the coins of the Arsacides, and as the Pahlavi Malkan MaTha on the coins and in the inscriptions of the Sassanians.
With the Mahommedan conquest of Persia and the fall of the Sassanians the title was abolished; it was in use for a short time during the ioth Century, having been granted to Shah Ismail Samani by the Caliph Motadid A.D, 900; it appeared again on coins of Nadir Shah, 1736-1747, and was assumed by the present dynasty, the Kajars, in 1799.