Year 1626 (MDCXXVI) was a common year starting on Thursday (link will display the full calendar) of the Gregorian calendar and a common year starting on Sunday of the 10-day slower Julian calendar.

Saint Peter or Simon Peter was an early Christian leader and one of the twelve apostles of Jesus who is featured prominently in the New Testament Gospels and the Acts of the Apostles and who is venerated as a saint. The son of John or of Jonah, he was from the village of Bethsaida in the province of Galilee or Gaulanitis. His brother Andrew was also an apostle. Peter is venerated in multiple churches and is regarded as the first Pope by the Catholic Church. After working to establish the church of Antioch, presiding for seven years as the leader of the city's Christian community, he preached to scattered communities of believers, Jews, Hebrew Christians and the gentiles, in Pontus, Galatia, Cappadocia, Asia Minor and Bithynia.^{[citation needed]} He then went to Rome, where in the second year of Claudius, it is claimed, he overthrew Simon Magus and held the Sacerdotal Chair for 25 years.^{[citation needed]} He is said to have been put to death at the hand of Emperor Nero.

Peter wrote two General epistles. The Gospel of Mark is also ascribed to him (as Mark was his disciple and interpreter). On the other hand, several books bearing his name—the Acts of Peter, Gospel of Peter, Preaching of Peter, Revelation of Peter, and Judgement of Peter—are rejected by the Catholic Church as Apocryphal.