Andrew the Apostle in the context of "Christianity in Ukraine"

Saint Peter (born Shimon bar Yonah; 1 BC – AD 64/68), also known as Peter the Apostle, Simon Peter, Simeon, Simon, or Cephas, was one of the Twelve Apostles of Jesus and one of the first leaders of the early Christian Church. He appears repeatedly and prominently in all four New Testament gospels, as well as the Acts of the Apostles. Catholic and Orthodox tradition treats Peter as the first bishop of Rome – or pope – and also as the first bishop of Antioch. According to Christian tradition, Peter was crucified in Rome under Emperor Nero.

The ancient Christian churches venerate Peter as a major saint and the founder of the Church of Antioch and the Church of Rome, but they differ in their attitudes regarding the authority of his successors. According to Catholic teaching, Jesus promised Peter a special position in the Church. In the New Testament, the name "Simon Peter" is found 19 times. He is the brother of Andrew, and they both were fishermen. The Gospel of Mark, in particular, is traditionally thought to show the influence of Peter's preaching and eyewitness accounts. He is also mentioned as Peter or Cephas in Paul's First Letter to the Corinthians and the Epistle to the Galatians. The New Testament also includes two general epistles, First Peter and Second Peter, which are traditionally attributed to him, but modern scholarship generally rejects the Petrine authorship of both.

Crucifixion is a method of capital punishment in which the condemned is tied or nailed to a large wooden cross, beam or stake and left to hang until eventual death, which could take minutes to days. It was first used as a punishment by the Achaemenids, Carthaginians, and Romans, among others. Crucifixion has been used in some countries as recently as the 21st century.

The crucifixion of Jesus is central to Christianity and the cross (in Roman Catholicism usually depicted with Jesus nailed to it) is Christianity's preeminent religious symbol. His death is the most prominent example of crucifixion in history, which in turn has led many cultures in the modern world to associate the execution method closely with Jesus and with Christian spirituality. Other figures in Christianity are traditionally believed to have undergone crucifixion as well, including Saint Peter, who Church tradition says was crucified upside-down, and Saint Andrew, who Church tradition says was crucified on an X-shaped cross. Today, limited numbers of Christians voluntarily undergo non-lethal crucifixions as a devotional practice.

The Apostolic Autocephalous Orthodox Church of Georgia (Georgian: საქართველოს სამოციქულო ავტოკეფალური მართლმადიდებელი ეკლესია, romanized: sakartvelos samotsikulo avt'ok'epaluri martlmadidebeli ek'lesia), commonly known as the Georgian Orthodox Church or the Orthodox Church of Georgia, is an autocephalous Eastern Orthodox church in full communion with the other churches of Eastern Orthodoxy. It is Georgia's dominant religious institution, and a majority of Georgian people are members. The Orthodox Church of Georgia is one of the oldest churches in the world. It asserts apostolic foundation, and that its historical roots can be traced to the early and late Christianization of Iberia and Colchis by Andrew the Apostle in the 1st century AD and by Saint Nino in the 4th century AD, respectively. As in similar autocephalous Eastern Orthodox Christian churches, the church's highest governing body is the holy synod of bishops. The church is headed by the Patriarch of All Georgia, Ilia II, who was elected in 1977.

Eastern Orthodox Christianity was the state religion throughout most of Georgia's history until 1921, when the country, having declared independence from Russia in 1918, was occupied by the Red Army during the Soviet invasion of Georgia, becoming part of the Soviet Union. The current Constitution of Georgia recognizes the special role of the Georgian Orthodox Church in the country's history, but also stipulates the independence of the church from the state. Government relations are further defined and regulated by the Concordat of 2002.

The following is a chronological list of bishops and ecumenical patriarchs of Constantinople. The historical data on the first 25 bishops is limited with modern scholars debating their authenticity. The Foundation of the See by Andrew the Apostle is met with similar amounts of skepticism with scholars believing it to be a later tradition. The list is mostly based on the compilation made by Demetrius Kiminas, but there is no single "official" numbering of bishops. The official website of the patriarchate has a list of holders but gives them no numeral.

The Vocation of the Apostles is a fresco by the Italian Renaissance painter Domenico Ghirlandaio, executed in 1481–1482 and located in the Sistine Chapel, Rome. It depicts the Gospel narrative of Jesus Christ calling Peter and Andrew to become his disciples.