Carfax Tower is located at the northwest corner of Carfax. The Tower is all that remains of the 12th century St Martin's Church and is now owned by the Oxford City Council. It was the official City Church of Oxford, where the Mayor and Corporation were expected to worship, between c.1122 and 1896, when the main part of the church was demolished to make more room for traffic in the area. In 1896, the City Church was moved to All Saints Church in the High Street.