Few chastity belts date to a time anterior to the sixteenth century; and a fair number of those on exhibition are thought by experts not to be genuine. A number of well-authenticated specimens however do exist and there are representations in early MSS. One of these can be found in Konrad Kyeser von Eichstadt's military encyclopaedia, the "Bellifortis". The MS dealing largely with Kyeser's military experiences and dated 1405, is now in the library of the University of Gottingen: a girdle of chastity is shown and described. It appears to have been made of iron and could be locked; in appearance the girdle in question is heavy and had little in common with the more elegant later models. Laborde declared that chastity belts were heard of as early as 1350, but he gives no evidence.