The 1099 papal election following the death of Pope Urban II took place on 13 August 1099. Before his death, Urban had designated Cardinal Rainerius da Bieda as his successor. The cardinal-electors, with the consent of the lower Roman clergy, chose Rainerius, who, after a flight and over his considerable objections, accepted and took the name Paschal II. He was consecrated a bishop and crowned pope on the next day.

Pope Paschal II, born Ranierius, was head of the Catholic Church and ruler of the Papal States from 13 August 1099 to his death in 1118. A monk of the Abbey of Cluny, he was created the cardinal-priest of San Clemente by Pope Gregory VII (1073–85) in 1073. He was consecrated as pope in succession to Pope Urban II (1088–99) on 19 August 1099. His reign of almost twenty years was exceptionally long for a medieval pope.