The Prince of Wales once famously called French jewelry house Cartier 'a jewel to kings, and a king of jewels'', and there is no better symbol of timeless luxury than a diamond by Cartier. Louis, Pierre and Jacques Cartier were the grandsons of the founder of Cartier Diamonds - and were integral in establishing the brand worldwide. Louis in particular, is perhaps best known for his timepieces, having created the world's first wristwatch. Cartier can lay claim to some of the world's most important innovations in jewelry for the 20th Century.