Christ Church Cathedral is a cathedral of the Church of England in Oxford, England. It is also the chapel of Christ Church, a college of the University of Oxford; this dual role is unique in the Church of England. It is one of the smallest cathedrals in the Church of England.

The cathedral was originally the church of St Frideswide's Priory. The site was historically presumed to be the location of the nunnery founded by St Frideswide, the patron saint of Oxford, and the shrine is now in the Latin Chapel; originally containing relics translated at the rebuilding in 1180, it was the focus of pilgrimage from at least the 12th until the early 16th century.