Gaius Sallustius Crispus Passienus be the end of Agrippina's villainy, for Claudius' wife, Messalina, correctly perceiving the threat from Agrippina, attempted to have Lucius assassinated, in order to ensure the succession of Britannicus, her own son by the emperor. The attempt failed, and, after procuring Passienus' death, Agrippina worked to bring about the downfall of Messalina. She then seduced her uncle, the emperor, becoming his wife, and persuaded Claudius to adopt Lucius, naming him his heir in preference to his own son. Agrippina then procured the emperor's death, placing her son, now the emperor Nero, on the throne; he soon disposed of Britannicus. Agrippina
Otto IV, Holy Roman Emperor castle on 19 May 1218, requesting that he be mortally expiated in atonement of his sins. Historian Kantorowicz described the death as "gruesome": "deposed, dethroned, he was flung full length on the ground by the Abbot, confessing his sins, while the reluctant priests beat him bloodily to death. Such was the end of the first and last Welf Emperor." He is entombed in Brunswick Cathedral. Otto was related to every other King of Germany. He married twice: He had no children by either Beatrice or Marie. Otto IV, Holy Roman Emperor Otto IV (1175 – 19 May 1218) was one