"In the intellectual life and literature of the Sassanid era the main characteristic is the complete disappearance of Hellenism and the Greek language. Ardashir L. and Shapur I. still appended Greek translations to some of their inscriptions; but all of later date are drawn up in Pahlavi alone. The coins invariably bear a Pahlavi legend on the obverse the king's head with his name and title; on the reverse, a fire-altar (generally with the ascription "fire of Ardashir, Shapur, &c.," ie the fire of the royal palace), and the name of the place of coinage, usually abbreviated. The real missionaries of culture in the empire were the Aramaeans (Syrians), who were connected with the West by their Christianity, and in their translations diffused Greek literature through the Orient."