Gregory X, Pope
Gregory X, Pope, previously known as TEBALDO DE' VISCONTI, was born at Piacenza, of the illustrious family of Visconti. He was chosen pope while absent with the prince of Wales in the Holy Land. The see had been vacant nearly three years after the death of Clement IV. Gregory greatly encouraged the Crusades. In 1271 he summoned the Council of Lyons, which convened in 1274. See LYONS. He died at Arezzo, Jan. 19, 1276. This pope instituted the regulations of the conclave nearly as they exist at the present time. There are twenty-five epistles of Gregory in Labbe, ConciI. vol. xi. Gerard Vossius published his Vita et Epistolae (Grk. and Lat. Rome, 1587) See Bower, Hist. of Popes, vol. viii; Bonacci, Pontif Gregorio X (Rome, 1711, 4to).