Pope from 492. He upheld the primacy of the Roman see against Constantinople during the Acacian Schism. To rebut the Manichaean abhorrence of wine, he insisted on the Eucharist being received in both kinds. He also laid down that Ordinations should be at what later came to be called the Ember seasons. He wrote a treatise on the Two Natures in Christ. Although the Gelasian Sacramentary and the Decretum Gelasianum have been wrongly attributed to him, some of his work may be traced in the Leonine Sacramentary. Feast day, 21 Nov.