Pope Clement XI in the context of "Black Madonna of Częstochowa"

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 Third Order of St. Francis. 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.

The Patriarch of Lisbon (Latin: Patriarcha Olisiponensis, Portuguese: Patriarca de Lisboa), also called the Cardinal-Patriarch of Lisbon once he has been made cardinal, is the ordinary bishop of the Archdiocese of Lisbon. He is one of the few patriarchs in the Latin Church of the Catholic Church, along with the Patriarchs of Venice, the East Indies, and Jerusalem.

The diocese of Lisbon was created in the 4th century, but it lay vacant after 716 when the city was captured by the Moors; the diocese was restored when the city was captured by king Afonso I of Portugal during the Second Crusade in 1147. In 1393, Lisbon was raised to the dignity of a metropolitan archdiocese by Pope Boniface IX with the papal bull In eminentissimae dignitatis. In 1716, at the request of King John V, Pope Clement XI issued the bull In Supremo Apostolatus Solio granting the rank of Patriarch to the King's Chaplain, who had since been made Archbishop of West Lisbon.