The triumph of artistic decoration in the cathedrals, however, and the most marvelous page in the book of the Arts of the century, remains to be spoken of in their magnificent stained-glass windows. Where they learned their secret of glass-making we know not. Artists of the modern time, who have spent years in trying to perfect their own work in this line, would give anything to have some of the secrets of the glass-makers of the Thirteenth Century. Such windows as the Five Sisters at York, or the wonderful Jesse window of Chartres with some of its companions, are the despair of the modern {15} artists in stained glass. The fact that their glass-making was not done at one, or even a few, common centers, but was apparently executed in each of these small medieval towns that were the site of a cathedral, only adds to the marvel of how the workmen of the time succeeded so well in accomplishing their purpose of solving the difficult problems of stained glasswork. {opp15} [Illustration ] PASCHAL CANDLESTICK (BAPTISTERY, FLORENCE) [Illustration:] RELIQUARY (CATHEDRAL ORVIETO, UGOLINO DI VIERI) If, to crown all that has been said about the Thirteenth Century, we now add a brief account of what was accomplished for men in the matter of liberty and the establishment of legal rights, we shall have a reasonably adequate introduction to this great subject. Liberty is thought to be a word whose true significance is of much more recent origin than the end of the Middle Ages. The rights of men are usually supposed to have received serious acknowledgment only in comparatively recent centuries. The recalling of a few facts, however, will dispel this illusion and show how these men of the later middle age laid the foundation of most of the rights and privileges that we are so proud to consider our birthright in this modern time. The first great fact in the history of modern liberty is the signing of Magna Charta which took place only a little after the middle of the first quarter of the Thirteenth Century. The movement that led up to it had arisen amongst the guildsmen as well as the churchmen and the nobles of the preceding century. When the document was signed, however, these men did not consider that their work was finished. They kept themselves ready to take further advantage of the necessities of their rulers and it was not long before they had secured political as well as legal rights.