The Diocese of Peterborough forms part of the Province of Canterbury in England. Its seat is the Cathedral Church of Saint Peter, Saint Paul and Saint Andrew, which was founded as a monastery in AD 655 and re-built in its present form between 1118 and 1238.

Peterborough Cathedral, properly the Cathedral Church of St Peter, St Paul and St Andrew, formerly St Peter's Abbey and also still known as St Peter's Cathedral in the United Kingdom, is the seat of the Anglican Bishop of Peterborough, dedicated to Saint Peter, Saint Paul, and Saint Andrew, whose statues look down from the three high gables of the famous West Front. Although it was founded in the Anglo-Saxon period, its architecture is mainly Norman, following a rebuilding in the 12th century. With Durham and Ely cathedrals, it is one of the most important 12th-century buildings in England to have remained largely intact, despite extensions and restoration.