In 1529 Margaret brought about the negotiations that resulted in the famous Ladies' Peace between the Pope, the Emperor Charles, and the Kings of France, England and Bohemia. Margaret represented Spain, and Louise of Savoy, her sister-in-law and the mother of Francis, the King of France, represented that monarch. The result of the conferences was a treaty that was highly advantageous to Spain, and a great diplomatic victory for Margaret; but as all Europe was tired of war the terms were accepted and peace proclaimed amid great popular rejoicings, the fountains at Cambrai flowing wine instead of water. The splendid mantelpiece in the Hotel de Franc at Bruges was erected to commemorate this treaty, although it hardly does justice to the prominent part taken by Margaret in negotiating it. The conclusion of the Treaty of Cambrai marks the climax of Margaret's career and also that of the House of Austria. In addition to the vast empire ruled over by Charles, his brother Ferdinand was King of Bohemia, and his sisters Eleanor, Isabel, Marie and Katherine, Queens of France, Denmark, Hungary and Portugal respectively. All owed their brilliant positions to the patience and skill of their Aunt Margaret who, as her correspondence shows, was looking forward to the time when she could hand over the government of the Netherlands to the Emperor and spend her remaining days in quiet seclusion. Under her wise rule the Netherlands had attained the greatest prosperity ever known. Industry and commerce flourished, peace and safety reigned throughout her broad dominions. At her court in Malines Margaret gathered a brilliant group of artists, poets and men of letters. Mabuse (Jan Gossaert), Bernard Van Orley and Michel Coxcie were among the famous Flemish artists patronised by the Duchess. Rombaut Keldermans received many commissions as architect from the great Lady of Savoy and her Imperial nephew for important edifices not only at Malines but at Antwerp, Brussels, Ghent and throughout the Low Countries. In 1451 the Pope, Nicholas V, had proclaimed a Holy Year at Malines and enormous numbers of pilgrims visited the city in consequence. Their lavish gifts made possible the rapid erection of most of the splendid religious edifices with which the city is so amply provided, and it was during the reign of Margaret that these structures were completed and decorated. Among the beautiful buildings executed during this period may be mentioned the Belfry at Bruges, the tower of St. Rombaut, the Hotel de Ville at Ghent, the spire of the cathedral at Antwerp, the cathedral of Ste. Gudule at Brussels, and many minor churches throughout the Low Countries.