The language of the land in the Parthian empire was the native language of Iran. There is no trace pointing to any foreign language having ever been in public use under the Arsacids. On the contrary, it is the Iranian land-dialect of Babylonia and the writing peculiar to this--as both were developed before, and in, the Arsacid period under the influence of the language and writing of the Aramaean neighbours--which are covered by the appellation Pahlavi, _i.e._ Parthava, and thereby designated as those of the empire of the Parthians. Even Greek did not become an official language there. None of the rulers bear even as a second name a Greek one; and, had the Arsacids made this language their own, we should not have failed to find Greek inscriptions in their empire. Certainly their coins show down to the time of Claudius exclusively,[11] and predominantly even later, Greek legends, as they show also no trace of the religion of the land, and in standard attach themselves to the local coinage of the Roman east provinces, while they retain the division of the year as well as the reckoning by years just as these had been regulated under the Seleucids. But this must rather be taken as meaning that the great-kings themselves did not coin at all,[12] and these coins, which in fact served essentially for intercourse with the western neighbours, were struck by the Greek towns of the empire in the name of the sovereign. The designation of the king on these coins as “friend of Greeks” (φιλέλλην), which already meets us early,[13] and is constant from the time of Mithradates I., _i.e._ from the extension of the state as far as the Tigris, has a meaning only if it is the Parthian Greek city that is speaking on these coins. It may be conjectured that a secondary position was conceded in public use to the Greek language in the Parthian empire alongside of the Persian, similar to that which it possessed in the Roman state by the side of Latin. The gradual disappearance of Hellenism under the Parthian rule may be clearly followed on these urban coins, as well in the emergence of the native language alongside and instead of the Greek, as in the debasement of language which becomes more and more prominent.[14] [Sidenote: Extent of the Parthian empire.] As to extent the kingdom of the Arsacids was far inferior, not merely to the great state of the Achaemenids, but also to that of their immediate predecessors, the state of the Seleucids. Of its original territory they possessed only the larger eastern half; after the battle with the Parthians, in which king Antiochus Sidetes, a contemporary of the Gracchi, fell, the Syrian kings did not again seriously attempt to assert their rule beyond the Euphrates; but the country on this side of the Euphrates remained with the Occidentals. [Sidenote: Arabia.]