(Καινὸν Χωρίον; Kainòn Chōríon, Καινὸν Φρουρίον; Kainòn Phrouríon). Pontic fortification in the Paryadres mountains, captured by Pompey in 64/3 BC, the place where Mithridates VI kept the most precious treasures (Str. 12,3,31) and a secret archive (Plut. Pomp. 37,1). Kainon Chorion may have been located on the rock massif near Akgün (formerly Ahretköy) northwest of Niksar, where fortress ruins with stonework of the Hellenistic through the Byzantine periods, three flights of steps, and a cistern can be found.