The sole surviving child of Theodosius I (379–395 CE) and his second wife, Flavia Galla, Galla Placidia was, through her maternal line, a member of the Valentinian dynasty, since Flavia Galla was the daughter of Valentinian I (364–375 CE), niece of Valens (364–378 CE), sister of Valentinian II (375–392 CE), and half-sister of Gratian (367–383 CE), through whose wife Placidia was distantly connected with the Con…