Pope Anastasius IV, born Corrado Demetri della Suburra, was head of the Catholic Church and ruler of the Papal States from 8 July 1153 to his death in 1154. He is the most recent pope to take the name "Anastasius" upon his election.

The 1130 papal election was convoked after the death of Pope Honorius II and resulted in a double election. Part of the cardinals, led by Cardinal-Chancellor Aymeric de la Chatre, elected Gregorio Papareschi as Pope Innocent II, but the rest of them refused to recognize him and elected Cardinal Pietro Pierleoni, who took the name of Anacletus II. Although Anacletus had the support of the majority of the cardinals, the Catholic Church considers Innocent II as the legitimate Pope, and Anacletus II as Antipope.