To whom do bishops and dioceses report their activities? To archbishops? To cardinals? To the pope? Residential bishops (heads of dioceses) ultimately report to the pope. One way of doing this is through the reports they submit every five years, about six months in advance of their ad limina [“to the thresholds”] visits to the pope. On these visits to the tombs of the apostles Peter and Paul, residential bishops and their auxiliary bishops meet …