Which is a Roman Catholic church, Manchester Cathedral or Cathedral of St. Mary the Crowned? 
Manchester Cathedral: Manchester Cathedral, formally the Cathedral and Collegiate Church of St Mary, St Denys and St George, in Manchester, England, is the mother church of the Anglican Diocese of Manchester, seat of the Bishop of Manchester and the city's parish church. Cathedral of St. Mary the Crowned: The Cathedral of Saint Mary the Crowned is a Roman Catholic cathedral in Gibraltar.
Saint Mary the Crowned