Seeking further gains, Theodoric frequently ravaged the provinces of the
Eastern Roman Empire, eventually threatening Constantinople itself. By 486, there was little disputing the open hostilities between Theodoric and Zeno. The emperor sought the assistance of the Bulgars, who were likewise defeated by Theodoric. In 487, Theodoric began his aggressive campaign against Constantinople, blockading the city, occupying strategically important suburbs, and cutting off its water supply; although it seems Theodoric never intended to occupy the city, but instead to use the assault as a means of gaining power and prestige from the Eastern Empire. The Ostrogoths needed a place to live and Zeno was having serious problems with
Odoacer—the Germanic
foederatus and King of Italy—who although ostensibly viceroy for Zeno, was menacing Byzantine territory and not respecting the rights of Roman citizens in Italy. In 488/489, Zeno ordered Theodoric to overthrow Odoacer, and the latter stopped issuing coins in the emperor's name and "raised his son Thela to the position of Caesar." For this task, Theodoric received support from
Rugian king
Frideric, the son of his cousin Giso. Theodoric then moved with his people towards Italy in the autumn of 488. On the way he was opposed by the
Gepids, whom he
defeated at
Sirmium in August 489. Arriving in Italy, Theodoric won the battles of
Isonzo and
Verona in 489. Once again, Theodoric was pressed by Zeno in 490 to attack
Odoacer. Theodoric's army was
defeated by Odoacer's forces at
Faenza in 490, but regained the upper hand after securing victory in the
Battle of the Adda River on 11 August 490. For several years, the armies of Odoacer and Theodoric vied for supremacy across the Italian peninsula. Theodoric
besieged Odoacer in Ravenna until 2 February 493, when a treaty was signed making the kings joint rulers of Italy. Theodoric entered Ravenna on 5 March 493, and a banquet celebrating the treaty was organized on 15 March. At this feast, Theodoric, after making a toast, drew his sword and struck Odoacer, splitting him in two from collarbone to thigh. Theodoric had the king's most loyal followers slaughtered as well, making him the master of Italy. With Odoacer dead and his forces dispersed, Theodoric now faced the problem of settlement for his people. Concerned about thinning out the Amal line too much, Theodoric believed he could not afford to spread some 40,000 of his tribesmen across the entire Italian peninsula. Such considerations led him to the conclusion that it was best to settle the Ostrogoths in three concentrated areas: around
Pavia, Ravenna and
Picenum. Theodoric's kingdom was among the most "Roman" of the barbarian states and he successfully ruled most of Italy for thirty-three years following his treachery against Odoacer. He visited Rome in 500 where he stayed for 6 months and held games in the Circus, probably also in the Colosseum, and renewed the grain largesse to the Roman populace, which had perhaps been interrupted since the days of Odoacer. Theodoric's settlement policy involved granting Gothic warriors land in Italy through a modified version of the Roman
hospitalitas system. According to Wiemer, this provided a means of rewarding Gothic loyalty while avoiding wholesale confiscation of Roman estates. However, it also entrenched social divisions and created enduring tensions. , Rome. It reads "+REG(nante) D(omino) N(ostro) THEODERICO [b]O[n]O ROM(a)E", which translates as
With our master Theodoric the Good reigning in Rome [this brick was made]. Theodoric extended his hegemony over the
Burgundian and
Vandal kingdoms (along with Visigothic royals) through marriage alliances. He had married the sister of the mighty Frankish king,
Clovis—likely in recognition of Frankish power. He sent a substantial dowry accompanied by a guard of 5,000 troops with his sister
Amalafrida when she married the king of the Vandals and Alans,
Thrasamund. These policies aimed to position Theodoric as the senior monarch among the western barbarian kings. In 504–505, Theodoric extended his realms in the Balkans by defeating the Gepids, acquiring the province of Pannonia. Theodoric became regent for the infant Visigothic king, his grandson
Amalaric, following the defeat of
Alaric II by the Franks under Clovis in 507. The Franks were able to wrest control of
Aquitaine from the Visigoths, but otherwise Theodoric was able to defeat their incursions. In 511, the
Visigothic Kingdom was brought under Theodoric's direct control, forming a Gothic superstate that extended from the Atlantic to the Danube. While territories that were lost to the Franks remained that way, Theodoric concluded a peace arrangement with the heirs of the Frankish Kingdom once Clovis was dead. Additional evidence of the Gothic king's extensive royal reach include the acts of ecclesiastical councils that were held in Tarragona and Gerona; while both occurred in 516 and 517, they date back to the "regnal years of Theoderic, which seem to commence in the year 511". Like Odoacer, Theodoric was ostensibly only a
viceroy for the
augustus in Constantinople, but he nonetheless adopted the trappings of imperial style, increasingly emphasizing his "neo-imperial status". According to historian Peter Brown, Theodoric was in the habit of commenting that "An able Goth wants to be like a Roman; only a poor Roman would want to be like a Goth." Much like the representatives of the Eastern Empire, Theodoric chose to be clad in robes dyed purple, emulating the imperial colors and perhaps even to reinforce the imperial dispatch of the
augustus Anastasius I, which outlined Theodoric's position as an imperial colleague. Chroniclers like Cassiodorus added a layer of legitimacy for Theodoric and the Amal tribe from which he came by casting them as cooperative participants in the greater history of the Mediterranean dating back to the era of
Alexander the Great. Though he did not adopt the title
Imperator, Theodoric employed many of the ceremonial and symbolic forms associated with Roman emperors, including triumphal entries (
adventus), and formal addresses to the people (
adlocutio) of Rome. Wiemer argues that this ceremonial adoption of imperial norms served to legitimize Theodoric’s rule in the eyes of Roman elites. In reality—at least in part due to his formidable military—he was able to avoid imperial supervision, and dealings between the emperor and Theodoric were as equals. Unlike Odoacer, however, Theodoric respected the agreement he had made and allowed Roman citizens within his kingdom to be subject to Roman law and the Roman judicial system. The Goths, meanwhile, lived under their own laws and customs. Theodoric preserved legal distinctions between Goths and Romans by maintaining separate legal traditions. Roman subjects continued to be governed by Roman law, while Gothic military settlers operated under Gothic customary law. This legal bifurcation, according to Wiemer, was central to Theodoric’s vision of coexistence and order in his kingdom. Historian Hans-Ulrich Wiemer characterizes Theodoric's rule as based on a principle of “integration through separation,” whereby the Ostrogoths and the Roman population maintained distinct legal and cultural spheres. While Goths served primarily in military roles under their own legal codes, the Roman population continued to be governed by Roman law and staffed the civil administration. This dual structure allowed Theodoric to preserve ethnic identities while ensuring administrative stability in Italy. In 519, when a mob had burned down the
synagogues of Ravenna, Theodoric ordered the town to rebuild them at its own expense. Theodoric experienced difficulties before his death. He had married off his daughter
Amalasuintha to the Visigoth
Eutharic, but Eutharic died in August 522 or 523, so no lasting dynastic connection of Ostrogoths and Visigoths was established, which highlighted the tensions between the Eastern Empire and the West. The new
augustus,
Justin I—who replaced Anastasius, a man with whom Theodoric had good relations—was under the influence of his nephew
Justinian; somehow, imperial views hardened against the West and talk of Rome's fall emerged during this period, leading to questions about the legitimacy of barbarian rule. Theodoric's good relations with the
Roman Senate deteriorated due to a presumed senatorial conspiracy in 522, and, in 523, Theodoric had the philosopher and court official
Boethius and Boethius's father-in-law
Symmachus arrested on charges of treason related to the alleged plot. For his ostensible role, Theodoric had Boethius executed in 524. Although Theodoric initially promoted religious toleration between Arian Goths and Catholic Romans, tensions escalated in the final years of his reign. The arrest and execution of the Roman senator Boethius on charges of treason marked a turning point. In some ways, this event reflects Theodoric’s increasing political paranoia and declining trust in the Roman aristocracy. Despite the complex relationship between Theodoric and his son-in-law, the
Catholic Burgundian king
Sigismund, the two enjoyed a mutual peace for fifteen years. Then in 522, Sigismund killed his own son—Theodoric's grandson—Sigeric; an act which infuriated Theodoric and he retaliated by invading the Burgundian kingdom, accompanied by the Franks. Between the two peoples, Sigismund's Burgundian forces faced two fronts and were defeated. Meanwhile, Sigismund's
Arian brother
Godomar established himself as king over the remaining Burgundian territory and ruled for a decade. When Theodoric's sister Amalafrida sought to possibly change the direction of Vandal succession following the death of her spouse, the former Vandal king Thrasamund, the new Catholic Vandal king
Hilderic had her, along with the accompanying Gothic retinue, killed. Theodoric was incensed and planned an expedition to restore his power over the Vandal kingdom when he died of dysentery in the summer of 526. The Gothic king was succeeded by his grandson
Athalaric, with Theodoric's daughter
Amalasuintha serving as regent since Athalaric was but ten years of age when Theodoric died. Her role was to carry out the dead ruler's political testament, to seek accommodation with the senate, and maintain peace with the emperor. Suddenly the once united Goths were split and Theodoric's grandson Amalaric ruled the newly independent Visigothic kingdom for the next five years. ==Family and progeny==