At about this time, Tiberius' Praetorian Prefect Sejanus was becoming powerful in Rome and began feuding with Drusus the Younger. While the exact causes of the feud are unknown, 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.