For the next fourteen years, till Amalric reached manhood, Theodoric ruled Spain in his grandson’s behalf. [Sidenote: Theodoric king of the Visigoths.] He was recognised as king of the Visigoths, in common with Amalric, and ruled both halves of the Gothic race—reunited after an interval of two hundred years—with equal authority, and his royal mandates ran in Spain as well as in Italy. His delegate was Count Theudis, an Ostrogothic noble, who was made regent, and ruled at Narbonne over all the Visigothic realm west of the Rhone; while the Roman Liberius, named praetorian praefect of Gaul, administered Visigothic Provence from the ancient city of Arles. Theodoric’s power was now supreme from Sirmium to Cadiz, and from the upper Danube to Sicily. He ruled the larger half of the old Roman Empire of the West, and exercised much influence in Gaul and Africa, the two parts of it that were not absolutely in his hands. After the war of 507-10 Clodovech the Frank had died, and his four sons, who parted his realm, made peace with the Ostrogoth; while Gundobad, the Burgundian king, had been fain to follow their example even earlier. Twelve years of peace followed (511-523) before Theodoric, now in extreme old age, had occasion to interfere in Gaul. Sigismund, the husband of Theodoric’s elder natural daughter, was now king of the Burgundians. He was a gloomy and suspicious tyrant, and drew down the wrath of Theodoric by murdering his own heir, Sigeric, who was the Gothic king’s eldest grandson. To punish this crime Theodoric leagued himself with the Franks, and attacked Burgundy. He conquered, and took as his share of the spoil the lands between Durance and Drôme, with the cities of Avignon, Orange, and Viviers, the farthest extension to the north-west of the Ostrogothic empire. The circle of family alliances which Theodoric had made with his European neighbours was extended even beyond the Mediterranean. He married his sister, Amalafrida, a widowed princess, no longer in her first youth, to Thrasamund, the old king of the Vandals. In virtue of this connection he seems to have treated Thrasamund as a younger brother, if not as a vassal. When the Vandal dared to help the usurper Gesalic in Spain, Theodoric imposed a tribute on him, and bade him for the future do nothing without the counsel of his wife Amalafrida. Thrasamund did not resent this treatment, and for the future did all he could to propitiate his brother-in-law.