Council of Hatfield: 680 AD

The Council of Hatfield, presided over by Archbishop Theodore, addressed various theological issues pertaining to the nature of Christ, the Trinity, and the Virgin Mary. It emphasized the importance of adhering to the orthodox beliefs established by early Church Fathers, declaring that any denial of these doctrines would result in condemnation. The Council articulated the belief in the unity of Christ's two natures-divine and human-as well as the proper understanding of the Trinity as three consubstantial persons in one God. It also affirmed the Virgin Mary's perpetual virginity and her role as the Mother of God.