Jus Exclusivæ[[1]], or papal veto was the right, claimed by three Catholic powers, France, Spain, and Austria, to veto a candidate for the Papacy. The Pope is the Catholic Bishop and patriarch of Rome, and head of the Roman Catholic Church and the Eastern Catholic Churches. ...

A veto was last employed in the Papal conclave of 1903, on behalf of the Austrian Emperor Francis Joseph I, against Mariano Rampolla. The eventual successor to the papacy, Pope Pius X, abolished the aulic exclusiva. The Papal conclave of 1903 was caused by the death of the 93 year old Pope Leo XIII, who at that stage was the third longest reigning pope in history. ... Franz Joseph I Franz Joseph (in English also Francis Joseph) (August 18, 1830 - November 21, 1916) of the Habsburg Dynasty was Emperor of Austria and King of Bohemia from 1848 until 1916 and King of Hungary from 1867 until 1916. ... Mariano Rampolla (Full name Count Mariano Rampolla del Tindaro) was born on August 17, 1843 in Poizzi, Sicily, and died on December 17, 1913, in Rome. ... Pope Saint Pius X ( Latin: ) (June 2, 1835 — August 20, 1914), born Giuseppe Melchiorre Sarto, was Pope from 1903 to 1914, succeeding Pope Leo XIII (1878–1903). ...