Julio-Claudian dynasty reign as being strongly influenced by his mother Agrippina, his tutor Seneca, and the Praetorian Prefect Burrus, especially in the first year. He was made Emperor over his step-brother, Claudius' son Britannicus, who he had killed. Agrippina was believed to have poisoned Claudius, having allegedly poisoned her second husband Gaius Sallustius Crispus Passienus. She had also arranged the deaths of Caligula's third wife, Lollia Paulina and Messalina's mother Domitia Lepida the Younger. She saw that the dynasty's numbers dwindle with the execution of Marcus Junius Silanus Torquatus, a grandson of Julia the Younger, to strengthen Nero's claim, having previously arranged
Agrippina the Elder it ended when the Younger Drusus died of seemingly natural causes on 14 September AD 23. After the death of Tiberius' son, Agrippina wanted to advance the careers of her sons, who were all potential heirs for Tiberius. To achieve this, Agrippina presented the Great Cameo of France to Tiberius. It was a personalized gift that positioned the family of Germanicus around the emperor. The work was designed to convince Tiberius to choose her children as his heirs. It is likely she was the one who commissioned the Great Cameo of France. Ultimately, the death of Tiberius' son elevated her