Orthodoxy refers to a branch of Christianity that emphasizes the correct belief and practices as defined by the early Church. It is characterized by its adherence to the traditions and teachings of the Apostles and the Church Fathers, maintaining a rich liturgical life and a strong sense of community. Eastern Orthodoxy, one of the major divisions of Orthodoxy, includes various national churches such as the Greek Orthodox Church and the Russian Orthodox Church. These churches share a common theology and sacraments, focusing on the importance of the Holy Tradition alongside the Bible in guiding their faith and practices.