ガッラ・プラキディア
When Honorius died in 423, the "primicerius notariorum" Joannes () succeeded as "augustus" in the west; thereafter Theodosius II () – son and successor of Arcadius as "augustus" in the east – moved to install Galla Placidia's son Valentinian as emperor in the west instead, appointing him "caesar" on 23 October 424. After the fall of Joannes, Valentinian III was made "augustus" on the first anniversary of his investiture as "caesar"; he ruled the western provinces until his death on the 16 March 455, though Galla Placidia was regent during his youth. Galla Placidia died on 25 November 450.