Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Pages: 155. Chapters: Charlemagne, Carolingian dynasty, Scholasticism, List of Ecumenical Patriarchs of Constantinople, Carolingian Renaissance, List of Coptic Orthodox Popes of Alexandria, History of the Orthodox Church, History of the Catholic Church, History of Christian theology, History of Eastern Orthodox Christian theology, Christianity in the 11th century, History of medieval Christianity, Timeline of the Catholic Church, Christianity in the 9th century, History of the East-West Schism, Christianity in the 13th century, Christianity in the 15th century, Kingdom of Makuria, Christianity in the 14th century, Brethren of the Free Spirit, Christianity in the 7th century, Christianity in the 8th century, Christianity in the 6th century, Christianity in the 12th century, Christianised calendar, Conversion of non-Muslim places of worship into mosques, Condemnations of 1210-1277, Germanic Christianity, Christianity in the 10th century, Medieval Christian views on Muhammad, Christianized myths and imagery, Peace and Truce of God, List of Greek Orthodox Patriarchs of Alexandria, Church and state in medieval Europe, List of Greek Orthodox Patriarchs of Antioch, Tondrakians, List of Syriac Orthodox Patriarchs of Antioch, Saeculum obscurum, Crescentii, Ecclesiastical fief, Gelasian Sacramentary, Charlemagne and church music, Verbruderungsbuch, Admonitio Generalis, Confraternity book. Excerpt: The Eastern Orthodox Churches trace their roots back to the Apostles and Jesus Christ. Apostolic succession established the seats of Patriarchy (for example see the Greek Orthodox Patriarch of Jerusalem). Orthodoxy reached its golden age during the high point of the Byzantine Empire, taken over by the Bulgarian Orthodox Church and the Serbian Orthodox Church before it continued to flourish in Russia after the Fall of Constantinople. Numerous autocephalo...