Acacius of Melitene was a 5th-century metropolitan bishop who served the Christian community in Eastern Anatolia. During the Council of Ephesus in 431, he acted as a significant supporter of Cyril of Alexandria. He stood in opposition to Nestorius, participating in the theological debates of the era by delivering a homily and exchanging correspondence with Cyril. His leadership in Melitene preceded the tenure of his successor, Constantine.
Ecclesiastical career
Serving as a metropolitan bishop, Acacius played an active role in the major theological disputes of his time. At the Council of Ephesus, he collaborated closely with Cyril of Alexandria to oppose Nestorian views. This relationship was documented through written exchanges, as Acacius sent two letters to Cyril, who responded with two letters of his own.
Veneration
Recognized as a saint, he is commemorated within the Catholic and Orthodox traditions. His feast day is observed annually on April 17. His legacy remains tied to his participation in the foundational councils that shaped early Christian doctrine.