Pope Gregory X

Pope Blessed Gregory X
Bishop of Rome
Fresco of Gregory X by Buonamico Buffalmacco (c. 1330)
Church	Catholic Church
Papacy began	1 September 1271
Papacy ended	10 January 1276
Predecessor	Clement IV
Successor	Innocent V
Orders
Ordination	19 March 1272
Consecration	27 March 1272 by John of Toledo
Personal details
Born	Teobaldo Visconti c. 1210 Piacenza, Holy Roman Empire
Died	10 January 1276(1276-01-10) (aged 65–66) Arezzo, Holy Roman Empire
Previous post(s)	Archdeacon of Liège (1246–1271)
Coat of arms
Sainthood
Feast day	10 January
Venerated in	Catholic Church
Title as Saint	Blessed
Beatified	8 July 1713 Rome, Papal States by Pope Clement XI
Attributes	Papal vestments Papal tiara Crozier
Patronage	Diocese of Arezzo Franciscan tertiaries
Other popes named Gregory

Pope Gregory X (Latin: Gregorius X; c. 1210 – 10 January 1276), born Teobaldo Visconti, was head of the Catholic Church and ruler of the Papal States from 1 September 1271 to his death and was a member of the Secular Franciscan Order. He was elected at the conclusion of a papal election that ran from 1268 to 1271, the longest papal election in the history of the Catholic Church.

He convened the Second Council of Lyon and also made new regulations in regards to the papal conclave. Gregory was beatified by Pope Clement XI in 1713 after the confirmation of his cultus.

As to Gregory's regulations on the conduct of the conclave, though briefly annulled by Adrian V and John XXI, they remained in force until the 20th century. In 1798 Pope Pius VI, in consideration of the occupation of Rome by the French, dispensed the Cardinals from many of the conclave regulations, including those of Gregory X,^[1] while in 1878 Pope Pius IX, fearing that the Italians might invade the Vatican on his death and try to prevent or dominate a conclave, gave Cardinals great latitude in the regulating of the next conclave.^[2]