1. Syria is bounded on the north by Cilicia and the mountain Amanus; from the sea to the bridge on the Euphrates (that is, from the Issic Bay to the Zeugma in Commagene) is a distance of 1400 stadia, and forms the above-mentioned (northern) boundary; on the east it is bounded by the Euphrates and the Arabian Scenitæ, who live on this side the Euphrates; on the south, by Arabia Felix and Egypt; on the west, by the Egyptian and Syrian Seas as far as Issus. 2. Beginning from Cilicia and Mount Amanus, we set down as parts of Syria, Commagene, and the Seleucis of Syria, as it is called, then Cœle-Syria, lastly, on the coast, Phœnicia, and in the interior, Judæa. Some writers divide the whole of Syria into Cœlo-Syrians, Syrians, and Phœnicians, and say that there are intermixed with these four other nations, Jews, Idumæans, Gazæans, and Azotii, some of whom are husbandmen, as the Syrians and Cœlo-Syrians, and others merchants, as the Phœnicians. 3. This is the general description [of Syria].[545] In describing it in detail, we say that Commagene is rather a small district. It contains a strong city, Samosata, in which was the seat of the kings. At present it is a (Roman) province. A very fertile but small territory lies around it. Here is now the Zeugma, or bridge, of the Euphrates, and near it is situated Seleuceia, a fortress of Mesopotamia, assigned by Pompey to the Commageneans. Here Tigranes confined in prison for some time and put to death Selene, surnamed Cleopatra, after she was dispossessed of Syria.[546] 4. Seleucis is the best of the above-mentioned portions of Syria. It is called and is a Tetrapolis, and derives its name from the four distinguished cities which it contains; for there are more than four cities, but the four largest are Antioch Epidaphne,[547] Seleuceia in Pieria,[548] Apameia,[549] and Laodiceia.[550] They were called Sisters from the concord which existed between them. They were founded by Seleucus Nicator. The largest bore the name of his father, and the strongest his own. Of the others, Apameia had its name from his wife Apama, and Laodiceia from his mother. In conformity with its character of Tetrapolis, Seleucis, according to Poseidonius, was divided into four satrapies; Cœle-Syria into the same number, but [Commagene, like] Mesopotamia, consisted of one.[551] Antioch also is a Tetrapolis, consisting (as the name implies) [CAS. 750] of four portions, each of which has its own, and all of them a common wall.[552] [Seleucus] Nicator founded the first of these portions, transferring thither settlers from Antigonia, which a short time before Antigonus, son of Philip, had built near it. The second was built by the general body of settlers; the third by Seleucus, the son of Callinicus; the fourth by Antiochus, the son of Epiphanes.