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Cyclopedia of Biblical, Theological and Ecclesiastical Literature [1]

semi-Arian bishop of Sebaste, in Armenia, in the fourth century, was a great advocate of monasticism, which he introduced into Armenia. The ascetic fanatics called Eustathians are supposed to have taken their name and their practices from him (but (See Eustathians), 2). He also founded in Sebaste a hospital for the poor, over which he placed Aarius, then his devoted friend. But later Aarius charged him with avarice, and they quarreled. (See Lerians). Eustathius died about A.D. 380. Socrates Hist. Eccl. 2:43; Sozomen, Hist.  Ecclesiastes 3:14; Neander, Church Hist. Torrey's transl. 2:342; Hefele, Concliengaeschichtea 1:652 sq.

The Nuttall Encyclopedia [2]

Archbishop of Thessalonica, a Greek commentator of Homer, born in Constantinople; a man of wide classical learning, and his work on Homer of value for the extracts of writings that no longer exist; d . 1198.