Christianity in the 1st century, Apocalypticism, Second Temple, Cultural and historical background of Jesus, Ministry of Jesus, Jesus, Gospel harmony, New Testament view on Jesus' life, Apostolic Age, Eastern Orthodox worship, Divine Liturgy, Persecution of Christians in the New Testament, Persecution of Christians in the Roman Empire, Jerusalem in Christianity, Development of the Christian Biblical canon, Sabbath in Christianity, Biblical Sabbath, Biblical law in Christianity, History of Christianity.