These wars with Castile taught him at last that the true way to increase his realm was to leave Christian territory alone and to direct his energies southwards, gaining land only at the expense of the Moors.
So did the kingdom of Portugal come into existence, almost accidentally and without there being any division of race or of language between its inhabitants and those of Galicia.
The youngest of all the Peninsular kingdoms, it is the only one which still remains separate from the rest of the Spains, for when in 1580 union was forced on her by Philip ii., Portugal had had too glorious a past, and had become too different in language and in custom easily to submit to so undesired a union, while Spain, already suffering from coming weakness and decay, was not able long to hold her in such hated bondage.
It is not necessary here to tell the story of each of Affonso Henriques' descendants. He himself permanently extended the borders of his kingdom as far as the Tagus, and even raided the Moslem lands of the south as far as Ourique, beyond Beja. His son, Sancho i., finding the Moors too strong to make any permanent conquests beyond the Tagus, devoted himself chiefly—when not fighting with the king of Castile and Leon—to rebuilding and restoring the towns in Beira, and it was not till the reign of his grandson, Affonso iii., that the southern sea was reached by the taking of the Algarve in the middle of the thirteenth century.
Dom Diniz, Affonso iii.'s son, carried on the work of settling the country, building castles and planting pine-trees to stay the blowing sands along the west coast.
From that time on Portugal was able to hold her own, and was strong enough in 1387 to defeat the king of Castile at Aljubarrota when he tried to seize the throne in right of his wife, only child of the late Portuguese king, Fernando.
Under the House of Aviz, whose first king, João i., had been elected to repel this invasion, Portugal rose to the greatest heights of power and of wealth to which the country was ever to attain. The ceaseless efforts of Dom Henrique, the Navigator, the third son of Dom João, were crowned with success when Vasco da Gama landed at Calicut in May 1498, and when Pedro Alvares Cabral first saw the coasts of Brazil in 1500.
To-day one is too ready to forget that Portugal was the pioneer in geographical discovery, that the Portuguese were the first Westerns to reach Japan, and that, had João ii. listened to Columbus, it would have been to Portugal and not to Spain that he would have given a new world.
It was, too, under the House of Aviz that the greatest development in architecture took place, and that the only original and distinctive style of architecture was formed. That was also the time when the few good pictures which the country possesses were painted, and when much of the splendid church plate which still exists was wrought.
The sixty years of the Spanish captivity, as it was called, from 1580 to 1640, were naturally comparatively barren of all good work. After the restoration of peace and a revival of the Brazilian trade had brought back some of the wealth which the country had lost, the art of building had fallen so low that of the many churches rebuilt or altered during the eighteenth century there is scarcely one possessed of the slightest merit.