through their expeditions, greatly stimulated the Latin intellect, and helped to awaken in Western Europe that mental activity which resulted finally in the great intellectual outburst known as the Revival of Learning (see p. 471).
Among the effects of the Holy Wars upon the material development of Europe must be mentioned the spur they gave to commercial enterprise, especially to the trade and commerce of the Italian cities. During this period, Venice, Pisa, and Genoa acquired great wealth and reputation through the fostering of their trade by the needs of the crusaders, and the opening up of the East. The Mediterranean was whitened with the sails of their transport ships, which were constantly plying between the various ports of Europe and the towns of the Syrian coast. Moreover, various arts, manufactures, and inventions before unknown in Europe, were introduced from Asia. This enrichment of the civilization of the West with the " spoils of the East " we may allow to be emblemized by the famous bronze horses that the crusaders carried off from Constantinople, and set up before St. Mark's Cathedral in Venice. Lastly, the incentive given to geographical discovery led various travellers, such as the celebrated Italian, Marco Polo, and the scarcely less noted Englishman, Sir John Mandeville, to explore the most remote countries of Asia. Even that spirit of maritime enterprise and adventure which rendered illustrious the fifteenth century, inspiring the voyages of Columbus, Vasco de Gama, and Magellan, may be traced back to that lively interest in geographical matters awakened by the expeditions of the crusaders.
