During the Middle Ages the arts as practised in Rome were carried into all the different countries in which the Romans made conquests or sent their monks and missionaries to establish churches, convents, and schools. Thus the mediaeval arts were practised in Gaul, Spain, Germany, and Great Britain. No wall-paintings or mosaics remain from the early German or Celtic peoples; but their illuminated manuscripts are very numerous: miniature-painting was extensively done in Ireland, and many Irish manuscripts remain in the collections of Great Britain. When Charlemagne became the king of the Franks in 768, there was little knowledge of any art among his northern subjects; in 800 he made himself emperor of the Romans, also, and when the Franks saw all the splendor of Rome and other parts of Italy, it was not difficult for the great emperor to introduce the arts into the Frankish portion of his empire. All sorts of beautiful objects were carried from Italy by the Franks, and great workshops were established at Aix-la-Chapelle, the capital, and were placed under the care of Eginhard, who was skilled in bronze-casting, modelling, and other arts; he was called Bezaleel, after the builder of the Tabernacle. We have many accounts of the wall-paintings and mosaics of the Franks; but there are no remains of them that can be identified with positive accuracy. Miniature-painting flourished under the rule of Charlemagne and his family, and reached a point of great magnificence in effect, though it was never as artistic as the work of the Italian miniators; and, indeed, gradually everything connected with art was declining in all parts of the world; and as we study its history, we can understand why the terms Dark Ages and Middle Ages are used to denote the same epoch, remarkable as it is for the decay and extinction of so many beautiful things. THE CENTRAL, OR ROMANESQUE PERIOD. During the Romanesque Period (950-1250) architecture was pursued according to laws which had grown out of the achievements and experiences of earlier ages, and had reached such a perfection as entitled it to the rank of a noble art. But this was not true of painting, which was then but little more than the painting of the Egyptians had been, that is, a sort of picture-writing, which was principally used to illustrate the doctrines of religion, and by this means to teach them to peoples who had no books, and could not have read them had they existed.