Arsamosata (Middle Persian: *Aršāmšād, Old Persian: *Ṛšāma-šiyāti-, Ancient Greek: Ἀρσαμόσατα, Armenian: Արշամաշատ, romanized: Aršamašat) was an ancient and medieval city situated on the bank of the Murat River (called the Arsanias in classical sources), near the present-day city of Elazığ. It was founded in c. 240 BC by Arsames I,[1] the Orontid king of Sophene, Commagene and possibly Armenia.[2] The city served as a central center and royal residence of the Orontids of Sophene. The origin of its name is Persian, meaning "Joy of Arsames".[1] Naming cities such as the "joy of" or "happiness of" was an Orontid (and later Artaxiad) practice that recalled the Achaemenid royal discourse.[3]
It was left and destroyed in the 1st century BC. In the Middle Ages, it was called Ashmushat. In Roman and Byzantine times, it bore the names Armosota (Ἀρμόσοτα)[4] and Arsamosota (Ἀρσαμόσοτα).[5] It was also known in Byzantine times as Asmosaton.[6]: 247 It was called Shimshat in Arabic.[7] A prominent native of Arsamosata was the 10th-century poet Abu'l-Hasan Ali al-Shimshati.[7]
Arsamosata has been identified with the abandoned settlement site known as Haraba, [8]: 112 [9][10] located by the Murat River, near the east end of the Altınova plain, some 60 km east of Elazig,.[6] Much of the site now lies submerged under the waters of the Keban Dam. The hill that served as the former city's citadel now juts out toward the northeast into a shallow lake created by the dam.[8]: 112 The city itself appears to have been just below the hill on the southeast, although this is not entirely certain.[8]: 112