A tendency toward decentralisation was ingrained in the Spanish people from the earliest times. It was increased by the method in which the Christian conquest of Mahometan Spain was achieved. The Visigothic nobility, starting from separate points in Asturias and Navarre, advanced into Saracen territory and established counties and earldoms which were virtually independent of their mother-kingdoms. The Asturians expanded into Leon and thence over Galicia, northern Portugal, Old and New Castile. The power of the Leonese monarch over Galicia was nominal; Castile and Portugal separated from Leon almost as soon as they were wrested from the Mahometans. The Basques were always independent, and Navarre, though it became the mother of Aragon, had little connection with the latter region. On the Mediterranean shore Charlemagne drove the Moors from Catalonia and made it a province of his empire, but no sooner was he dead than it became independent. Toward the end of the thirteenth century. The Christian conquest was virtually completed, and the Peninsula had been divided into four kingdoms. Each of these was, however, in reality only a federation of semi-independent feudal divisions and municipalities united by personal allegiance to a single sovereign. In the course of the continual quarrelling of the monarchs their kingdoms frequently divided, coalesced, and separated again. The death of a king or the marriage of his daughter was often the signal for war and a readjustment of boundaries, but these overturnings did not much affect the component and really vital political units. More significant than the political kingdoms were the linguistic divisions. Spain then spoke, and still speaks, three languages, each of which has many dialects. From Asturias and Navarre the language, now known as Castilian, had spread over the central part of the Peninsula south to Cadiz and Murcia. From Galicia the Gallego had spread directly south along the Atlantic, where one of its dialects grew into the Portuguese. On the east coast the Catalonian, imported from Languedoc by the French conqueror, is a mere derivative of the Provencal. Its dialects are spoken all along the Mediterranean coasts of Spain as far south as Alicante, as well as in the Balearic islands. By 1300 A.D. two great political divisions, Castile and Aragon, covered three-fourths of the Peninsula, and their boundaries were well established; each, however, was a mere loose aggregation of provinces, and every province had its own laws and customs, its jealously guarded privileges, its legislative assembly, and its free municipalities. Galicia had never become incorporated with Leon; the Basques ruled themselves; Catalonia was really independent of Aragon; Castile had, from the beginning, been virtually independent, although under the same monarch as Leon, and, indeed, had taken the latter's place as the metropolitan province of the kingdom.