In spite of the great popularity of the "Nibelungenlied", the poem was soon forgotten by the mass of the people. With the decay of courtly chivalry and the rise of the prosperous citizen class, whose ideals and tastes lay in a different direction, this epic shared the fate of many others of its kind, and was relegated to the dusty shelves of monastery or ducal libraries, there to wait till a more cultured age, curious as to the literature of its ancestors, should bring it forth from its hiding places. However, the figures of the old legend were not forgotten, but lived on among the people, and were finally embodied in a popular ballad, "Das Lied vom Hürnen Seyfrid", which has been preserved in a print of the sixteenth century, although the poem itself is thought to go back at least to the thirteenth. The legend was also dramatized by Hans Sachs, the shoemaker poet of Nuremberg, and related in prose form in a chap book which still exists in prints of the eighteenth century. The story and the characters gradually became so vague and distorted, that only a trained eye could detect in the burlesque figures of the popular account the heroes of the ancient Germanic Legend. The honor of rediscovering the "Nibelungenlied" and of restoring it to the world of literature belongs to a young physician by the name of J.H. Obereit, who found the manuscript C at the castle of Hohenems in the Tirol on June 29, 1755; but the scientific study of the poem begins with Karl Lachmann, one of the keenest philological critics that Germany has ever produced. In 1816 he read before the University of Berlin his epoch-making essay upon the original form of the "Nibelungenlied". Believing that the poem was made up of a number of distinct ballads or lays, he sought by means of certain criteria to eliminate all parts which were, as he thought, later interpolations or emendations. As a result of this sifting and discarding process, he reduced the poem to what he considered to have been its original form, namely, twenty separate lays, which he thought had come down to us in practically the same form in which they had been sung by various minstrels.