In the thirteenth and fourteenth centuries throughout Europe pearls were very fashionable as personal ornaments, and were worn in enormous quantities; the dresses of men as well as of women were decorated and embroidered with them, and they were noted in nearly every account of a festive occasion, whether it were a marriage, a brilliant tourney, the consecration of a bishop, or the celebration of a victory in battle. The faceting of crystal gems was not known at that time, and those dependent on artifice for their beauty were not much sought after. Although the diamond had been known from the eighth century, it was not generally treasured as an ornament, and not until long after the invention of cutting in regular facets—about 1450—did it attain its great popularity. In the Dark Ages, it was customary for princes and great nobles to carry their valuables about with them even on the battle-fields; first, in order to have them always in possession, and second, on account of the mysterious power they attributed to precious stones. Since jewels constituted a large portion of their portable wealth, nobles and knights went into battle superbly arrayed. In this manner the treasures were easily lost and destroyed; consequently, relatively few of the personal ornaments of that period are preserved to the present time. Among the greatest lovers of pearls in the fourteenth and fifteenth centuries were the members of the ducal house of Burgundy, and especially Philip the Bold (1342–1404), Philip the Good (1396–1467), and Charles the Bold (1433–77), and some of the gems which they owned are even now treasured in Austria, Spain, and Italy. When Duke Charles the Bold, in the year 1473, attended the Diet of Treves, accompanied by his five thousand splendidly equipped horsemen, he was attired in cloth of gold garnished with pearls, which were valued at 200,000 golden florins.[28] We are told that “almost a sea of pearls” was on view at the marriage of George the Rich with Hedwig, the daughter of Casimir III of Poland, at Landshut, in 1475. Among the many ornaments was a pearl chaplet valued at 50,000 florins which Duke George wore on his hat, and also a clasp worth 6000 florins.[29] Members of the related houses of Anjou and Valois also held great collections. Nor in this account should we omit some of the English sovereigns, including especially Richard II (1366–1400), one of the greatest dandies of his day.