After succeeding her father, Urraca (1109–26), then widowed, married Alfonso I (the Battler), who served as the king of Aragon and Navarre from 1104–34. The tension and conflict that plagued their marriage from the beginning finally caused Alfonso I to withdraw to Aragon. Alfonso VII (1126–57), Urraca’s son by Raymond of Burgundy, restored the prestige of the Leonese monarchy. His coronation as emperor—the first and last imperial coronation in Spain—in the cathedral of León in 1135 was intended to assert Leonese claims to ascendancy throughout Spain; however, the newly formed federation of Aragon and Catalonia and the newly independent kingdom of Portugal soon offered a daunting challenge to Leonese predominance.
After dissolving his marriage to Urraca, Alfonso I extended his frontiers to the Ebro River by seizing Zaragoza in 1118. Then, marching directly into the heart of Islamic Spain, he liberated the Mozarabs of Granada (Gharnāṭah) and settled them in Aragon. Thereafter, the Mozarabic population left in Islamic Spain appears to have been minimal. Before he died, Alfonso willed his realms to the military orders of the Hospitallers (Knights of Malta) and Templars and to the Church of the Holy Sepulchre in Jerusalem, but his people rejected this arrangement. The Navarrese, who had been ruled by the kings of Aragon since 1076, chose their own monarch, García IV Ramírez (1134–50), and the Aragonese asked Ramiro II (1134–37), the deceased king’s brother, to leave the monastic life and accept the kingship. After marrying and fathering a child, Petronila, who could inherit the kingdom, Ramiro returned to his monastery. Petronila was betrothed in 1137 to Count Ramon Berenguer IV of Barcelona (1131–62), who assumed responsibility for the governance of the kingdom. Alfonso II (1162–96), the child of this marriage, united under his rule the kingdom of Aragon and the county of Barcelona. Usually referred to as the Crown of Aragon, the federation of the kingdom and the county endured until the Middle Ages despite countless vicissitudes and disparate linguistic and cultural traditions. Catalonia soon emerged as a maritime power in the Mediterranean, while Aragon, an inland kingdom with an agricultural and pastoral economy, was controlled by a landed aristocracy. Both regions retained their characteristic customs and laws and vigorously opposed all efforts at assimilation.
The county of Portugal—originally part of the kingdom of León—which Alfonso VI had assigned to Teresa and Henry of Burgundy, also began to move from autonomy to independence. Teresa and Henry’s son, Afonso I Henriques (1128–85), repudiated Leonese suzerainty and took the royal title about 1139. By becoming a papal vassal and promising to pay a yearly tribute, he hoped to safeguard himself against Leonese reprisals. Only in 1179 did the pope formally address him as king.
Meanwhile, internal dissension and the rise of the Almohads, a new Islamic Amazigh confederation based in Morocco, led to the disintegration of the Almoravid empire. The Christian rulers, seizing the opportunity offered by civil war among the Muslims, raided at will throughout Islamic Spain and conquered some important places. Afonso I, aided by a fleet of Crusaders from northern Europe, captured Lisbon in 1147, while Alfonso VII and Ramón Berenguer IV, supported by a fleet from Pisa (Italy), seized the great seaport of Almería (Al-Marīyah) on the southeastern coast. The fall of Tortosa (Ṭurṭūshah) and Lérida (Lāridah) to the count of Barcelona in the next year advanced the county’s frontier to the mouth of the Ebro and concluded the expansion of Catalonia. Nevertheless, the Almohads, after crushing the Almoravids, invaded the peninsula and recovered Almería in 1157. By subjugating all of Islamic Spain, the Almohads were effectively able to halt any further Christian advance. The rise of Castile and Aragon
Alfonso VII subverted the idea of a Leonese empire, and its implied aspiration to dominion over a unified peninsula, by the division of his kingdom between his sons: Sancho III (1157–58) received Castile and Ferdinand II (1157–88) received León. Although the Christians remained on the defensive in the face of Almohad power, Alfonso VIII of Castile (1158–1214) and Alfonso II of Aragon concluded a treaty in 1179 apportioning their expected conquest of Islamic Spain between them. Castile retained the right of reconquest to Andalusia and Murcia (Mursīyah), while Aragon claimed Valencia. Nevertheless, Alfonso VIII’s efforts to dominate the other Christian rulers provoked contention and warfare and thwarted any concerted effort against the Almohads. Thus, in 1195 the king of Castile suffered a disastrous defeat by the Almohads at Alarcos (Al-Arak), south of Toledo. The other Christian monarchs, acknowledging that the Almohads threatened them all, came to terms with Castile. With the collaboration of Sancho VII of Navarre (1194–1234) and Peter II of Aragon (1196–1213) and Portuguese and Leonese troops, in 1212 Alfonso VIII triumphed over the Almohads at Las Navas de Tolosa (Al-ʿIqāb). The victory by the Christian forces was significant, marking the beginning of the end of the Almohad empire and opening Andalusia to the Christians.
While the kings of Aragon took an active role in the Reconquista, as counts of Barcelona they also had important relationships in southern France, where several lords were their vassals. When Pope Innocent III proclaimed a Crusade to check the spread of the Albigensian heresy throughout that area, Peter II, though no friend of the heretics, realized that his feudal rights and interests there were endangered by the arrival of northern French knights. In 1213 Peter was defeated and killed by the Crusading army at Muret after he went to the aid of his brother-in-law, the count of Toulouse. In the generation after his death, Catalan ambition and power were steadily curtailed in southern France.
As the Almohad empire fell apart in the second quarter of the 13th century, the Christian rulers reconquered nearly all of Spain. James I of Aragon (1213–76) utilized Catalan naval power in 1229 to conquer the kingdom of Majorca (Mayūrqah), the first significant step in Catalan expansion in the Mediterranean. The subjugation of the kingdom of Valencia was more difficult, especially as James was diverted temporarily by the expectation of acquiring Navarre. When Sancho VII died without children, the people of Navarre accepted his nephew, Count Theobald of Champagne (1234–53), as their king. Thereafter, French interest in Navarre steadily increased. Forced to give up his aspirations there, James I resumed the war against the Muslims and captured Valencia in 1238, bringing thousands of Muslims under his rule.
Meanwhile, Alfonso IX of León (1188–1230) drove southward to the Guadiana River (Wadi Ānā) and captured Mérida (Māridah) and Badajoz in 1230, clearing the way to Sevilla. When he died, his son Ferdinand III, already king of Castile (1217–52) by reason of inheritance from his mother, Berenguela, a daughter of Alfonso VIII, succeeded him as king of León. Henceforth Castile and León were permanently united. Using the combined resources of the two kingdoms, Ferdinand conquered Cordoba in 1236, Murcia in 1243, Jaén (Jayyān) in 1246, and Sevilla in 1248. The Muslims retained only the kingdom of Granada, whose rulers were obliged to pay an annual tribute to Castile. As a vassal kingdom, Granada by itself was not a threat, but, when supported by the Muslims of Morocco, this last outpost of Islamic power in Spain caused great difficulty for the Christians. Society, economy, and culture
The development of Christian society and culture in the first 300 years after the Islamic conquest was slow, but major changes occurred more quickly in the 12th and 13th centuries. The size of the population grew, communication with northern Europe intensified, commerce and urban life gained in importance, and the Reconquista was executed with greater success than ever.