Parthenius an Eastern prelate, flourished in the second half of the 17th century. He was successor to Cyrill Lucar (q.v.) in the patriarchate of Constantinople. Parthenius was a man of unusual mental powers, and in his position held remarkable sway. Not only in the East, but also in Russia his influence was felt. Opposed to all reformatory inroads, the freed the Church from Calvinistic doctrinal tendencies, as well as everything that betrayed the influence of Protestant ideas. He was also the principal promoter of the Ο᾿ρθόδοξος ὁμολογία, which the Russian orthodox metropolitan Peter Mogilas (q.v.) prepared, and which in the synod at Jerusalem in 1672 was adopted as the principal confession of the whole Greek Church. Parthenius died very near the close of the 17th century. See Neale, Hist. of the Eastern Church (patriarchate of Constantinople).