LIMINA APOSTOLORUM, an ecclesiastical term used to denote Rome, and especially the church of St Peter and St Paul.
Some of their powers of legislation and administration they possess motu proprio in virtue of their position as diocesan bishops, others they enjoy under special faculties granted by the Holy See; but all bishops are bound, by an oath taken at the time of their consecration, to go to Rome at fixed intervals (visitare sacra limina apostolorum) to report in person, and in writing, on the state of their dioceses.
Decennially each bishop of the United States is expected to pay a visit to Rome (Ad Limina Apostolorum), and to make a report of the spiritual condition of religion within his diocese.
He addressed general letters both to the bishops, reminding them of their duties to the Roman Church, especially of their required visits ad limina, and to the whole Christian people, urging a new crusade to recover Jerusalem.
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