Nicolas de Harlay, seigneur de Sancy Maximilien de Béthune, duc de Sully. Meanwhile he had been a second time converted to Catholicism, but his influence at court waned, and he retired from public life in 1605. He survived until 13 October 1629, leaving a "Discours sur l'occurrence des affaires". His son, Achille Harlay de Sancy (1581–1646), was bishop of Saint-Malo. The Sancy diamond's known history began circa 1570 in Constantinople when purchased by de Sancy. Something of a gem connoisseur, de Sancy used his knowledge to prosperous advantage. Henry III of France suffered from premature baldness and tried to conceal this fact by wearing a cap.
Auction catalog allow users to look at past sales for getting estimates Auction catalog An auction catalog (US spelling) or auction catalogue (British spelling) is a catalogue that lists items to be sold at an auction. It is made available some time before the auction date. Auction catalogs for rare and expensive items, such as some art, books, jewelry, postage stamps, and antique furniture, are of interest in themselves: they will often include detailed descriptions of the items, their provenance, historical significance, photographs, and so forth. In some cases, auction catalogues are key documentation for rare objects that are in private collections,