Amid Albi's arabesques the artists from Bologna and Modena inscribed their names, and some young lovers wrote "Antonia, mia bella," and "Lucrezia Cantora, bolognesa." The frescoes give the genealogy of Christ. They recall Perugino, Francia, and Pintoriccio. Never was blue background more marvelous--a strong rare hue neither indigo nor Prussian nor peacock, but a blending of them all in a cerulean depth of color--an art as entirely lost to posterity as the blue background of Suger's windows. Chemical analysis has busied itself with Albi's frescoes, too; but though the blue color of the vault panels was found to be obtained from the precipitation of salts of copper by carbonate of potassium, how to produce a similar hue to-day remains unsolved. Over the blue background wind lovely arabesques, and the saints portrayed are stately Italians of the Renaissance. The diagonals and transverse arches are colored in old-gold. On the western wall of the church a XV-century fresco was painted directly on the bricks, a Last Judgment copied from popular woodcuts of the day, with the punishments of the seven deadly sins pitilessly set forth. The painting was ruthlessly cut into when a chapel was introduced under the western tower. The side chapels of Ste. Cécile are illuminated in gold and color like a Book of Hours. Never was there a church of such contrasts: within--a shrine of warm, polished, over-splendid beauty, and without--the most rugged feudal challenge of the Middle Ages. CARCASSONNE[237] It is the first sharp vision of an unknown town, the first immediate vision of a range of hills, that remains forever, and is fruitful of joy within the mind ... that is perhaps the chief of the fruits of travel.--HILAIRE BELLOC. The Cité of Carcassonne was long one of the most formidable fortresses of Europe, covering the route from ocean to sea and guarding a pass into Spain. These Pyrenean provinces of France gave Joffre and Foch to the World War. The lower walls of the Cité were of Rome's building; above came the Visigothic defenses; then St. Louis extended the fortifications and his son completed them.