Anatolius of Constantinople was a 5th-century prelate who served as the Patriarch of Constantinople from 449 until his death in 458. Originally from Alexandria, he served as a deacon under Cyril before rising to high ecclesiastical office. During his tenure, he participated in major ecumenical councils, including the Council of Ephesus and the Council of Chalcedon. He was a significant figure in the theological disputes of his era, representing various interests within the early Christian hierarchy.