Flavian of Antioch was a prominent Christian bishop who served as the Patriarch of Antioch from 381 to 404 AD. He is known for his role in the early Church and his efforts to combat heresies, particularly those related to the nature of Christ. Flavian was a supporter of the Nicene Creed, which affirmed the divinity of Jesus and countered Arianism. His tenure was marked by theological disputes and conflicts with other church leaders, including the influential bishop John Chrysostom. Flavian's legacy includes his commitment to orthodoxy and his contributions to the development of early Christian doctrine.