STRENGTH AND WEALTH OF THE EMPIRE
The Roman Empire in the East, though often menaced by barbarian foes, long continued to be the leading European power. Its highest degree of prosperity was reached between the middle of the ninth and the middle of the eleventh century. The provinces in Asia Minor and the Balkan peninsula produced a vast annual revenue, much of which went for defense. It was necessary to maintain a large, well-disciplined army, great fleets and engines of war, and the extensive fortifications of Constantinople and the frontier cities. Confronted by so many dangers, the empire could hope to survive only by making itself a strong military state.
COMMERCE AND INDUSTRY
The merchant ships of Constantinople, during the earlier part of the Middle Ages, carried on most of the commerce of the Mediterranean and the Black Sea. The products of Byzantine industry, including silks, embroideries, mosaics, enamels, and metal work, were exchanged at that city for the spices, drugs, and precious stones of the East. Byzantine wares also found their way into Italy and France and, by way of the Russian rivers, reached the heart of eastern Europe. Russia, in turn, furnished Constantinople with large quantities of honey, wax, fur, wool, grain, and slaves. A traveler of the twelfth century well described the city as a metropolis "common to all the world, without distinction of country or religion."
CHARACTER OF BYZANTINE ART
Many of the Roman emperors from Justinian onward were great builders. Byzantine architecture, seen especially in the churches, became a leading form of art. Its most striking feature is the dome, which replaces the flat, wooden roof used in the basilican [15] Churches of Italy. The exterior of a Byzantine church is plain and unimposing, but the interior is adorned on a magnificent scale. The eyes of the worshiper are dazzled by the walls faced with marble slabs of variegated colors, by the columns of polished marble, jasper, and porphyry, and by the brilliant mosaic pictures of gilded glass. The entire impression is one of richness and splendor. Byzantine artists, though mediocre painters and sculptors, excelled in all kinds of decorative work. Their carvings in wood, ivory, and metal, together with their embroideries, enamels, and miniatures, enjoyed a high reputation throughout medieval Europe.
INFLUENCE OF BYZANTINE ART
Byzantine art, from the sixth century to the present time, has exerted a wide influence. Sicily, southern Italy, Rome, Ravenna, and Venice contain many examples of Byzantine churches. Italian painting in the Middle Ages seems to have been derived directly from the mosaic pictures of the artists of Constantinople. Russia received not only its religion but also its art from Constantinople. The great Russian churches of Moscow and Petrograd follow Byzantine models. Even the Arabs, in spite of their hostility to Christianity, borrowed Byzantine artists and profited by their services. The Mohammedan mosques of Damascus, Cairo, and Cordova, both in methods of construction and in details of ornamentation, reproduce Byzantine styles.
LITERATURE AND LEARNING
The libraries and museums of Constantinople preserved classical learning. In the flourishing schools of that city the wisest men of the day taught philosophy, law, medicine, and science to thousands of students. The professors figured among the important persons of the court: official documents mention the "prince of the rhetoricians" and the "consul of the philosophers." Many of the emperors showed a taste for scholarship; one of them was said to have been so devoted to study that he almost forgot to reign. When kings in western Europe were so ignorant that they could with difficulty scrawl their names, eastern emperors wrote books and composed poetry. It is true that Byzantine scholars were erudite rather than original. Impressed by the great treasures of knowledge about them, they found it difficult to strike out into new, unbeaten paths. Most students were content to make huge collections of extracts and notes from the books which antiquity had bequeathed to them. Even this task was useful, however, for their encyclopedias preserved much information which otherwise would have been lost. During the Middle Ages the East cherished the productions of classical learning, until the time came when the West was ready to receive them and to profit by them.