About the middle of the thirteenth century this ring was transferred, for greater security, from the Church of St. Mostiola, which lay outside the city, to the cathedral, where it was seen, April 17, 1355, by Emperor Charles IV, on his return from his coronation. In 1420, by order of the bishop, the ring was taken to the Church of St. Francesco. There was a belief that a mysterious virtue emanated from it which acted miraculously upon the sight of those who gazed upon it. Learning of this, Filippo Maria, Duke of Milan, who suffered from a disease of the eye, requested, in 1445, that the ring might be brought to him. Although Pope Eugene IV supported his request, the historian inclines to the belief that nothing came of the matter, _for the Duke became completely blind a year later_. Among the Franciscan friars who had the care of the ring was a certain “Fra Vinterio” (Winter), called “the German,” from the land of his birth. Possibly because he was a foreigner, he became an object of dislike, and upon the occurrence of a robbery of some articles of value, his fellow monks eagerly seized upon the occasion to fix the guilt upon the unfortunate Winter. He was cast into prison and subjected to the most cruel tortures, but as no avowal could be wrung from him, he was finally released and resumed his life in the community. However, although outwardly calm, the cruelties to which he had been subjected burned into his soul, and aroused thoughts of vengeance. He could think of but one way to punish his tormentors effectively, and that was by taking away the precious ring. If this were lost, the Chiusans would place the blame upon its careless guardians and would perhaps drive them from the city. Winter succeeded in taking wax impressions of the keys of the chamber where the ring was kept and of the case wherein it lay. He had duplicate keys made from these impressions, and, on the night of July 23, 1473, he secured possession of the ring. Of course he was no longer safe in Chiusi and he made all haste to Perugia, where he determined to rid himself of his treasure and curry favor with the Perugians by conferring it upon them. His offer was accepted without hesitation, and when the Chiusans energetically demanded the return of the ring, the Perugians refused compliance. The matter was brought before the Roman court and was the subject of prolonged controversy. For a time it seemed as though resort would be had to arms, but finally, in 1486, a decision was reached to the effect that the ring should remain in Perugia. Here it has been preserved ever since, and many wonderful stories are told of its miraculous virtue. In seasons of prolonged drought and also when the land was deluged by superabundant rains, the betrothal ring of the Virgin was solemnly borne from the chapel of St. Joseph, where it was kept, to the high altar, and the result was always fortunate.