Holy Name Cathedral, formally the Cathedral of the Holy Name, is the seat of the Roman Catholic Archdiocese of Chicago, one of the largest Roman Catholic dioceses in the United States. It is also the parish church of the Archbishop of Chicago. Located in Chicago, Illinois in the United States, Holy Name Cathedral replaced the Cathedral of Saint Mary and the Church of the Holy Name, both destroyed by the Great Chicago Fire in October 1871. The cathedral was finally dedicated on November 21, 1875.