Parnassus, a titular see in Cappadocia Secunda, suffragan of Mocessus. Situated between Ancyra : and Archelais, it was formerly important. Another route led to Nyssa. It is mentioned by Polybius (XXV, iv) and the Itineraries; in the sixth century by Hierocles, “Synecdemus” (700, 7). Hamilton places it at Kotch Hissar, near Touz Gheul (ancient Lake Tatta), vilayet, of Angora; Ramsay (Asia Minor, 298), north-east of this lake on the left bank of Kizil Irmak (ancient Halys), near Tchikin Aghyl. The see first depended on Cæsarea; under Valens it passed to Cappadocia Secunda; and about 536 was made suffragan of Mocessus. The “Notitiæ: Episcopatuum” mention it in the thirteenth century. Le Quien (Oriens christianus, I, 415) mentions nine bishops: Pancratius, at the Arian Council of Philippopolis, 344; Hypsius, replaced by the Arian Ecdicius in the time of St. Basil; Olympius, at the Council of Constantinople, 381; Eustathius, at Ephesus, 341, deposed as a Nestorian, retracted, assisted at Constantinople (448) and Chalcedon (451 1); and signed in 458 the letter of the bishops of Cappadocia Secunda to the Emperor Leo; Pelagius, at Constantinople, 538; Eustathius, at the Council “in Trullo”, 692; Stephanus, at Nica, 787; and Theognostus at Constantinople, 869.
S. Pétridès.