Samosata - A settlement in Mesopotamia and Osroene
Samosata was an ancient city on the right (west) bank of the Euphrates. It was founded by Sames, a king of Armenia.

For a time, the city was called Antiochia in Commagene. As Antiochia in Commagene, it served as the capital for the Hellenistic kingdom of Commagene from c. 160 BC until it was surrendered to Rome in 72. A civil metropolis from the days of Emperor Hadrian, Samosata was the home of the Legio VI Ferrata and later Legio XVI Flavia Firma, and the terminus of several military roads.

Ancient Samosata continues to the present day as the Turkish town of Samsat. The old town of Samsat was submerged in 1989 under the Ataturk Dam. A new town bearing the same name was built for the population dislocated by the sinking of the old town.

Modern location: Submerged

(1) Hadrian 117-138 AD
AE unit Samosata
Obverse: Laureate head right; AΔPIANOC_CEBACTOC
Reverse: Within wreath: ΦΛA / CAM / MHTPO / KOM
Ref: SNG Cop 17, BMC 20, SGICV 1235
(2) Philip I 244-249 AD
Obverse: laureate, draped and cuirassed bust right; AVTOK K M IOVΛI ΦIΛIΠΠOC CEB
Reverse: City goddess left seated on rocks, holding grain ears, facing eagle standing on her right hand, below pegasos left; ΦΛ CAMOCATEWN METPOΠ KOM
Ref: BMC Galatia pg. 122, 47; SNG Copenh...
(3) Valerian I AD 255-256
Obverse: IMP C P LIC VALERIANVS P F AVG, radiate and draped bust right
Reverse: PIETAS AVGG, Valerian and Gallienus standing facing each other, sacrificing over altar
Ref: RIC 285; RSC 152; Sear 9955
(4) Valerian I 255-256 AD
Obverse: radiate, draped and cuirassed bust right; IMP C P LIC VALERIANVS AVG
Reverse: turreted woman standing right, presenting wreath to Valerian standing half left, wearing military dress, holding scepter; RESTITVT ORI_ENTIS
Ref: RIC 286var (Büste), RSC 188var (dit...
(5) Valerian II 255-256 AD
Obverse: radiate, draped and cuirassed bust right from behind; VALERIANVS NOBIL CAES
Reverse: Valerian II standing half right with head left, crowning trophy to the left with wreath holding shield and spear; PRINC IVVENT_VTIS
Ref: Göbl MIR 1694b, RIC V 49, RSC IV 67...