The Feast of Saints Peter and Paul or Solemnity of Saints Peter and Paul is a liturgical feast in honor of the martyrdom in Rome of the apostles Saint Peter and Saint Paul, which is observed on 29 June. The celebration is of ancient Christian origin, the date selected being the anniversary of either their death or the translation of their relics.

Paul, commonly known as Paul the Apostle and Saint Paul, was a Christian apostle who spread the teachings of Jesus in the first-century world. For his contributions towards the New Testament, he is generally regarded as one of the most important figures of the Apostolic Age, and he also founded several Christian communities in Asia Minor and Europe from the mid-40s to the mid-50s AD.