– Council of Chalcedon, an ecumenical council of the Church: The monophysitism of Eutyches is repudiated, and the Chalcedonian Definition set forth. As a result of this council, the Oriental Orthodox Churches eventually become a separate communion. More immediately, Jerusalem becomes a Patriarchate, and Dioscorus of Alexandria is deposed as Patriarch of Antioch. Births Brigit of Kildare, Irish patron saint (approximate date) Jacob of Serugh, Syrian poet and theologian (approximate date) Deaths July 29 – Tuoba Huang, prince of Northern Wei (b. 428) Theodoric I, king of the Visigoths Liu Yikang, prince of the Liu Song dynasty (b. 409) Pei Songzhi, Chinese historian (b. 372) References