 It was assigned as suffragans the diocese of Faenza and the diocese of Imola.In a decree of the Vatican Sacred Congregation of Bishops of 8 December 1976, a new arrangement of certain dioceses in ecclesiastical provinces was announced; the diocese of Ferrara was made a suffragan of the Archbishop of Bologna, though the Archbishop of Ferrara was allowed to keep the title of archbishop.Nine of the early bishops have been recognized as saints in popular culture, and three other bishops and three archbishops have been elected to the Papacy as Pope Innocent VII (1404), Pope Nicholas V (1447), Pope Julius II (1503), Pope Gregory XV (1621), Pope Benedict XIV (1740) and Pope Benedict XV (1914).