This article is devoted to the historical signifi cance and ecclesiology of the council of Rome, 382. It considers this council to be the fi nal point in the history of the Arian crisis in the Latin West. The original plan of the Western emperor Gratianus, supported by the Roman pope Damasus and St. Ambrose of Milan, to hold the council in the general format, was not fully implemented due to the convening by the Eastern emperor Theodosius of the parallel council in Constantinople. In spite of this, the Roman council took a number of important decisions, both ecclesiastico-political and doctrinal. Our study proceeds following the traditional attribution of the third part of the so-called Decretum Gelasianum to the Roman council of 382. The e...