In the year 1200, Baldwin, Count of Hainault and Flanders, led the fifth crusade. Turning aside from the road to Jerusalem, he captured Constantinople, and was crowned Emperor in St. Sophia. During the fifty years that Baldwin and his descendants reigned in Constantinople, ships from Flanders brought the luxuries of the Orient to Western Europe. Many cargoes of silks and spices, of linen, damask and carpets, and other Eastern products, were landed on the wharves of Ghent and Bruges, which became the greatest centers of European commerce. The influence of the Crusades upon social progress in Belgium was not less marked than upon commerce. Shrewd townsmen who furnished their lord with means to equip his followers exacted in return a pledge of additional freedom. While the powerful nobles were in the Holy Land, moreover, their tenants were relieved from their demands, and made progress in all the arts of life. When, after the death of Charlemagne, the river Scheldt was made the boundary of France, to the west of that river lay West Francia, which became France; to the east stretched Lotharingia, shortened to Lorraine, the land of Lothaire, a narrow strip separating France and Germany. As the various counts who possessed the Netherlands grew stronger the Duchy of Lorraine grew weaker. Flanders especially, under the rule of counts descended from Baldwin the Iron-Armed, made great progress--lowlands were protected by dikes, forests were cleared away, and towns were built. It was easily the most powerful part of Belgium. The Normans, who for a century had been the terror of the Netherlands, now visited Flemish towns to dispose of the booty they had won upon the sea, and Bruges became the chief seat of this trade. The townspeople of this period fared rather better than those in the rural districts. Many of the towns had originated as a cluster of peasants' huts, grouped around a monastery for protection. The inhabitants were tenants of the abbot, who in time became one of the powerful lords of the land. But the necessary organization of town life gave the citizens the habit, to some extent, of working together. Consequently, when a body of townsmen presented their plea for more privileges, they were able to obtain better terms than could be gained by single peasants pleading separately. So great was the prosperity of the towns that, by the year 1066, Flanders was able to assist William the Conqueror, who had married Matilda, daughter of Baldwin V, Count of Flanders, and Flemish knights fought side by side with the Normans at Hastings. On the famous Bayeux tapestry--which, however, is not real tapestry--wrought by Matilda, is pictured the story of the Conquest of England. Woolen cloths, the work of Flemish weavers, were already famous throughout Europe, and were carried by the sailors of the Netherlands to western and southern ports, with the jewelry, corn and salt, also produced in Flanders.