The Oriental Orthodox Church is a group of Christian denominations that reject the Council of Chalcedon, held in 451 AD. This church includes several national churches, such as the Coptic Orthodox Church in Egypt, the Armenian Apostolic Church, and the Ethiopian Orthodox Tewahedo Church. They share a common belief in the nature of Christ, emphasizing that Christ is one united nature, both divine and human. The Oriental Orthodox Churches are known for their rich traditions, liturgical practices, and theological teachings. They have a significant presence in the Middle East, Africa, and parts of Asia, and they focus on maintaining their ancient customs while engaging with contemporary issues facing their communities.