There is much evidence that the above pendants were used as diplomatic presents. An example was presented by Louis XIV to a Netherlands diplomat Anthonie Heinsius (1641-1720) and is now in The Hague Museum. This same jewel has been traced to the Régistre du Présents du Roi where the supplier is named as the king's jeweller M. Montarsy. A similar example belongs to the church of Santa Maria della Vita in Bologna and a further one (with Petitot miniature of William III) is in the Royal Collection. Contemporary documents refer to them as boites à portraits (they originally came in outer cases) and they relate to a design of circa 1660 in the sketchbook of Thomas Cletscher (1598-1668) in the Museum Boymans-Van Beuningen, Rotterdam. Cf. Frits Scholten, 'Concerning the miniature case of Louis XIV', Exhibition Catalogue A Sparkling Age, 17th Century Diamond Jewellery, Antwerp 1993, pp.55-62, A. Somers Cocks, 'Louis XIV's Official Presents of Jewellery', The International Silver & Jewellery Fair & Seminar Handbook, London 1985, pp.10-14 and M.H. Gans, Juwelen en Mensen, Amsterdam 1961, pl.172