The diocese of Cádiz and Ceuta is a suffragan of the Roman Catholic Archdiocese of Seville; that is, it is a diocese within the metropolitan see of Seville.
Historically, the diocese counts among its most famous prelates Cardinal Juan de Torquemada, a Dominican theologian and expert on canon law, who took a leading part in the Councils of Basle and Florence, and defended, in his Summe de Ecclesia, the direct power of the pope in temporal matters.