Valentinian II
In 383, Gratian had died while facing a major revolt under Magnus Maximus. Maximus proceeded to establish his control of a portion of the Roman Empire including Britain, Gaul, Hispania and the Diocese of Africa. He ruled from his capital at Augusta Treverorum (Treves, Trier) and was able to negotiate his recognition by Valentinian II and Theodosius I, starting from 384. The area of Valentinian II had effectively been limited to Italia, ruling from Mediolanum (modern Milan).