Pope Anastasius III reigned after Sergius III from April 911 until June 913.
Pope Sergius III died on 0911-04-14.
Pope Sergius II died on 847-01-24.
Pope Sergius IV died on 1012-05-12.
Pope Leo IV was elected pope after Sergius II. Leo IV was made pope on April 10 847 and he reigned until his death on July 17th 855 AD. Leo reigned in difficult times as the Saracens were invading Europe and political ties were high with tension. Leo's ability and sanctity in facing these trials was such that he was canonized by the Church and is reverenced by the faithful as Saint Leo IV.
Pope Victor III died of natural causes in 1087. Pope Urban III succeeded him. Pope Victor III became pope in 1085.
Sergius I was chosen by a group of judges, soldiers, clergy, and citizens from the region around Rome which finally settled the problem of three claimants to the chair of Peter.
A:The history of the tenth century is not always clear, especially in respect to some otherwise obscure popes. Christopher's predecessor Leo V was imprisoned and murdered either by his successor, Christopher, or the following year by Pope Sergius III.There should only be one pope at any one time, so if Christopher murdered Leo there is no problem and his election was valid. If, on the other hand, Leo was merely imprisoned by Christopher and was murdered by Pope Sergius III, who also murdered Christopher, then Sergius III would be a true pope, but Christopher was only an antipope.Christopher was considered a true pope until the nineteenth or twentieth century, but is now considered an anti-pope, which means that he is now considered not to have been properly elected because Leo was still in prison but alive.
Pope Alexander III was pope in 1170.
The Crusades were launched by Pope Urban II, not Pope Urban III.
Pope Stephen IV was chosen after the death of Pope Leo III.
Pope Alexander III
Pope Pius III was the predecessor of Pope Julius II.