In the centre of the kingdom arose its famous capital, the populous and beautiful city of Granada, standing in the midst of a great vega or plain, one hundred miles and more in circumference and encompassed by the snowy mountains of the Sierra Nevada. The seventy thousand houses of the city spread over two lofty hills and occupied the valley between them, through which ran the waters of the Douro. On one of these hills stood the Alcazaba, a strong fortress; on the other rose the famous Alhambra, a royal palace and castle, with space within its confines for forty thousand men, and so rare and charming in its halls and courts, its gardens and fountains, that it remains to-day a place of pilgrimage to the world for lovers of the beautiful in architecture. And from these hills the city between showed no less attractive, with its groves of citron, orange, and pomegranate trees, its leaping fountains, its airy minarets, its mingled aspect of crowded dwellings and verdant gardens. High walls, three leagues in circuit, with twelve gates and a thousand and thirty towers, girded it round, beyond which extended the vega, a vast garden of delight, to be compared only with the famous plain of Damascus. Through it the Xenil wound in silvery curves, its waters spread over the plain in thousands of irrigating streams and rills. Blooming gardens and fields of waving grain lent beauty to the plain; orchards and vineyards clothed the slopes of the hills; in the orange and citron groves the voice of the nightingale made the nights musical. In short, all was so beautiful below and so soft and serene above that the Moors seemed not without warrant for their fond belief that Paradise lay in the skies overhanging this happy plain.