Towards the end of the ninth and at the beginning of the tenth century great changes took place on the banks of the Roya, and the foundations of Bruges as we know it now were laid. Just as in the memorable years 1814 and 1815 the empire of Napoleon fell into fragments, and princes and statesmen hastened to readjust the map of Europe in their own interests, so in the ninth century the empire of Charlemagne was crumbling away; and in the scramble for the spoils, the Normans carried fire and sword into Flanders. Charles the Bald, King of the Franks, at this crisis called to his aid the strong arm of Baldwin, a Flemish chief of whose ancestry we know little, but who soon became famous as Baldwin Bras-de-Fer--Baldwin of the Iron Arm, so called because, in peace or war, he was never seen without his coat of mail. This grim warrior had fallen in love with the daughter of Charles the Bald, Judith, who had been already twice married, first to the Saxon King Ethelwulf (after the death of his first wife Osberga, mother of Alfred the Great) and secondly to Ethelbald, on whose death she left England and went to live at Senlis. Baldwin persuaded the Princess to run away with him; and they were married without the knowledge of her father, to escape whose vengeance the culprits fled to Rome. Pope Nicholas I. brought about a reconciliation; and Charles not only pardoned his son-in-law, but appointed him ruler of Flanders under the title of Marquis, which was afterwards changed into that of Count. It is to the steel-clad Baldwin Bras-de-Fer that the Counts of Flanders trace the origin of their title; and he was, moreover, the real founder of that Bruges which rose to such glory in the Middle Ages, and is still, though fallen from its high estate, the picturesque capital of West Flanders, whither artists flock to wander about amidst the canals and bridges, the dismantled ramparts, the narrow streets with their curious houses, and the old buildings which bear such eloquent testimony to the ruin which long ago overtook what was once an opulent and powerful city. When the wrath of his father-in-law had been appeased, Baldwin, now responsible for the defence of Flanders, came to Bruges with his wife, and there established his Court. But the old burg, it seems, was not thought capable of holding out against the Normans, who could easily land on the banks of the Zwijn; and Baldwin, therefore, set about building a new stronghold on the east side of the old burg, and close to it. It was surrounded partly by the main stream of the Roya, and partly by backwaters flowing from it. Here he built a fortress for himself and his household, a church dedicated to St. Donatian, a prison, and a 'ghiselhuis,' or house for the safe keeping of hostages. The whole was enclosed by walls, built close to the edge of the surrounding waters.