The Visigoths also posed difficulties for Theosodius’s heirs. The new king, Alaric, rose in rebellion soon after the death of the emperor in 395 but was kept in check by the general Stilicho. Rome’s failure to make concessions to Alaric and the massacre of barbarian soldiers in the imperial army following Stilicho’s execution in 408 led to Alaric’s invasion of Italy and sack of Rome in 410, which sent shock waves throughout the empire. Alaric died soon after, however, and was succeeded by Athaulf, who moved into southern Gaul. Failing to win recognition for his people as foederati, or allies, of the empire, he was forced into Tarraconensis, where he was assassinated in 415. Under his successor, Wallia (415–418), the Romans acknowledged the Visigoths as allies and encouraged them to campaign against the other barbarian tribes in the peninsula. Those Alans and Siling Vandals who survived Visigothic attacks sought refuge with the Asdings and the Suebi in Galicia. In 418 the Roman emperor Honorius authorized the Visigoths to settle in Gaul in the provinces of Aquitania Secunda and Narbonensis.
The Suebi and the Asding Vandals meanwhile continued to lay waste to Spain. Led by King Gaiseric (Genseric), the Vandals crossed the Strait of Gibraltar into North Africa in 429. They subjugated that province and governed it and the Balearic Islands until the Byzantine reconquest in 534. In Spain the Suebi, initially pagans, accepted Arianism, but in the middle of the 6th century they were converted to Roman Catholic Christianity by St. Martin of Dumio, bishop of Braga. Their independent kingdom in Galicia survived until the Visigoths subdued it in 585.
The Visigoths, as allies of Rome, aided in the defense of Gaul against Attila and the Huns. However, the unchecked deterioration of the Western Empire resulted in the rupture of the fragile alliance between Rome and the Visigoths. Under the rulership of Euric (466–484), the Visigoths founded an independent kingdom in southern Gaul, centred at Toulouse. In Spain the Visigoths drove the Suebi back into Galicia and occupied Tarraconensis and part of Lusitania. For the moment the provinces of Baetica and Carthaginiensis were left to take care of themselves.
Despite the collapse of imperial rule in Spain, Roman influence remained strong. The majority of the population, probably about six million, were Hispano-Romans, as compared with 200,000 barbarians. Hispano-Romans held many administrative positions and continued to be governed by Roman law embodied in the Theodosian Code. The Codex Euricianus (“Code of Euric”), which was completed in 475 or 483 or under Euric’s son a generation later, was written in Latin and designed as the personal law of the Visigoths. It also addressed relations between Euric’s Roman and Visigothic subjects. In 506 Euric’s son Alaric II (484–507) published a legal code, known as the Breviarium Alariciarum (“Breviary of Alaric”) or the Lex Romana Visigothorum (“Roman Law of the Visigoths”), which was based on the Theodosian Code and meant to serve the needs of the Roman population.
Visigothic dominance over southern Gaul came to an end when Clovis I and the Franks defeated Alaric II at Vouillé in 507. As a consequence of Frankish expansion, the Visigoths were compelled to penetrate more deeply into Spain, where their kings eventually established themselves at Toledo (Toletum). Meanwhile, as part of his effort to reconquer the Western Empire, the Byzantine emperor Justinian took advantage of struggles among the barbarians to regain control of the southern and eastern coasts of Spain. For about 70 years the Byzantines maintained a foothold in that part of the peninsula.
Although the Visigoths had been in contact with the Roman world for more than a century before their effective settlement in Spain and had acquired a veneer of Romanization, significant legal, cultural, social, and religious differences kept them apart from the Hispano-Roman population. Aside from different languages and disparities in education, these diverse peoples were subject to distinct bodies of law. Although the Visigoths were Christian, they held to the Arian heresy against the Roman Catholic Christianity of the Hispano-Romans. The Visigothic king was theoretically ruler of only his own people, whereas the Hispano-Romans continued to profess allegiance to a rapidly vanishing imperial authority. A Roman law that prohibited intermarriage between the two peoples was, however, abolished in the late 6th century. Still, the task of bringing the two peoples together and of achieving some sort of political and cultural unity was a formidable one. The Visigothic kingdom
The Hispano-Roman population did not easily absorb the Visigoths. Because the Suebi maintained an independent kingdom in Galicia and the Basques steadfastly opposed all attempts at subjugation, the Visigoths did not control the entire peninsula. To the great satisfaction of the Hispano-Romans, Byzantine authority was restored in the southeast early in the 6th century. However, in the second half of the century Leovigild (568–586), the most effective of the Visigothic monarchs, advanced the unification of the peninsula by conquering the Suebi and subduing the Basques. Ruling from Toledo in the centre of the peninsula, he transformed Visigothic kingship by adopting the throne and other Roman symbols of monarchy. A committed Arian Christian, Leovigild sought to unify the kingdom by encouraging conversion of the Catholic Hispano-Roman population to his faith. Despite his efforts to bring the Arian faith more in line with Catholic teaching and his emphasis on conversion rather than compulsion, Leovigild’s attempt was ultimately unsuccessful and may have contributed to the failed revolt of his son Hermenegild (later St. Hermenegild), who had accepted Roman Catholicism and hoped, perhaps, to become king. Hermenegild’s rebellion, however, may have been incidental to his conversion, and Leovigild’s policy of uniting this people through religion would be vindicated by his other son, Reccared.
Recognizing that the majority of the people adhered to the Catholic faith, Reccared (586–601) repudiated his father’s religion and announced his conversion to Catholicism. As the Gothic nobles and bishops followed his lead, a principal obstacle to the assimilation of Visigoths and Hispano-Romans was lifted. Thereafter, the Hispano-Romans, no longer expecting deliverance by Byzantium, developed a firm allegiance to the Visigothic monarchy. As a consequence, Swinthila (621–631) was able to conquer the remaining Byzantine fortresses in the peninsula and to extend Visigothic authority throughout Spain.
Not only was the conversion of the Visigoths a sign of the predominance of Hispano-Roman civilization, but it also brought the bishops into a close relationship with the monarchy. Indeed, both Hermenegild and Reccared had close ties with St. Leander of Sevilla, who was involved with their conversions and was the brother of the encyclopaedist Isidore. Kings, imitating Byzantine practice, exercised the right to appoint bishops, the natural leaders of the Hispano-Roman majority, and to summon them to the Councils of Toledo. Although the Councils of Toledo were essentially ecclesiastical assemblies, they had an exceptional impact on the government of the realm. The bishops, once they had heard a royal statement concerning current issues, enacted canons relating to church affairs, but they also touched on secular problems, such as royal elections or cases of treason. Through their councils the bishops provided essential support for the monarchy, but, in striving to achieve a peaceful and harmonious public order, the bishops sometimes compromised their independence.
The hostility of the nobility to hereditary succession and an absence of natural heirs tended to preserve the elective character of the monarchy. Because the Visigoths had a reputation for assassinating their kings, the bishops tried to safeguard the ruler by means of an anointment ceremony. The holy oil manifested to all that the king was under God’s protection and now had a sacred character. The bishops, hoping to eliminate the violence associated with a royal election, also devised the procedures to be followed. The royal household (officium palatinum), which imitated the Roman imperial model, assisted the king in governing, but when necessary the king also consulted assemblies of magnates and notables (aula regia). Dukes, counts, or judges were responsible for the administration of provinces and other territorial districts surviving from Roman times. Self-government had long since disappeared in the towns. Agriculture and animal husbandry were the mainstays of the economy. Evidence suggests that commercial and industrial activity were minimal.