History of the Eastern Orthodox ChurchThe History of the Eastern Orthodox Church is the formation, events, and transformation of the Eastern Orthodox Church through time. According to the Eastern Orthodox tradition the history of the Eastern Orthodox Church is traced back to Jesus Christ and the Apostles. The Apostles appointed successors, known as bishops, and they in turn appointed other bishops in a process known as Apostolic succession. Over time, five Patriarchates were established to organize the Christian world, and four of these ancient Patriarchates remain Orthodox today.
Development of the Old Testament canonThe Old Testament is the first section of the two-part Christian biblical canon; the second section is the New Testament. The Old Testament includes the books of the Hebrew Bible (Tanakh) or protocanon, and in various Christian denominations also includes deuterocanonical books. Orthodox Christians, Catholics and Protestants use different canons, which differ with respect to the texts that are included in the Old Testament.
Biblical SabbathThe Sabbath is a weekly day of rest or time of worship given in the Bible as the seventh day. It is observed differently in Judaism and Christianity and informs a similar occasion in several other faiths. Observation and remembrance of Sabbath is one of the Ten Commandments ("Remember the sabbath day, to keep it holy") considered to be the fourth in Judaism, Eastern Orthodoxy, and most Protestant traditions, and the third in Roman Catholic and Lutheran traditions.
Lord's DayThe Lord's Day in Christianity is generally Sunday, the principal day of communal worship. It is observed by most Christians as the weekly memorial of the resurrection of Jesus Christ, who is said in the canonical Gospels to have been witnessed alive from the dead early on the first day of the week. According to some sources, Christians held the Sabbath as resting day, commemorating the God's Commandment, which said that the Sabbath should be the day of resting, according to .
Apostles in the New TestamentIn Christian theology and ecclesiology, the apostles, particularly the Twelve Apostles (also known as the Twelve Disciples or simply the Twelve), were the primary disciples of Jesus according to the New Testament. During the life and ministry of Jesus in the 1st century AD, the apostles were his closest followers and became the primary teachers of the gospel message of Jesus. There is also an Eastern Christian tradition derived from the Gospel of Luke of there having been as many as seventy apostles during the time of Jesus' ministry.
Didascalia ApostolorumDidascalia Apostolorum, or just Didascalia, is a Christian legal treatise which belongs to the genre of the Church Orders. It presents itself as being written by the Twelve Apostles at the time of the Council of Jerusalem; however, scholars agree that it was actually a composition of the 3rd century, perhaps around 230 AD. The Didascalia was clearly modeled on the earlier Didache. The author is unknown, but he was probably a bishop. The provenance is usually regarded as Northern Syria, possibly near Antioch.
History of Christian theologyThe doctrine of the Trinity, considered the core of Christian theology by Trinitarians, is the result of continuous exploration by the church of the biblical data, thrashed out in debate and treatises, eventually formulated at the First Council of Nicaea in AD 325 in a way they believe is consistent with the biblical witness, and further refined in later councils and writings. The most widely recognized Biblical foundations for the doctrine's formulation are in the Gospel of John, which possess ideas that originate in Platonism and Greek philosophy.
Early ChristianityEarly Christianity, or Paleochristianity, describes the historical era of the Christian religion up to the First Council of Nicaea in 325. Christianity spread from the Levant, across the Roman Empire, and beyond. Originally, this progression was closely connected to already established Jewish centers in the Holy Land and the Jewish diaspora. The first followers of Christianity were Jews who had converted to the faith, i.e. Jewish Christians. Early Christianity contains the Apostolic age and is followed by, and substantially overlaps with, the Patristic era.
Christian theologyChristian theology is the theology of Christian belief and practice. Such study concentrates primarily upon the texts of the Old Testament and of the New Testament, as well as on Christian tradition. Christian theologians use biblical exegesis, rational analysis and argument.
Christianity in the 1st centuryChristianity in the 1st century covers the formative history of Christianity from the start of the ministry of Jesus (27–29 AD) to the death of the last of the Twelve Apostles (100) and is thus also known as the Apostolic Age. Early Christianity developed out of the eschatological ministry of Jesus. Subsequent to Jesus' death, his earliest followers formed an apocalyptic messianic Jewish sect during the late Second Temple period of the 1st century.
