thumb|256px|A Game of Piquet, imaginary 17th century scene painted in 1861 by [[Jean-Louis-Ernest Meissonier (1815–1891), National Museum of Wales]]
Piquet (; ) is an early 16th-century plain-trick card game for two players that became France's national game. It is first mentioned, as Le Cent, in a written reference dating to 1535, in Gargantua and Pantagruel by Rabelais. Although legend attributes the game's creation to Stephen de Vignolles, also known as La Hire, a knight in the service of Charles VII during the Hundred Years' War, it may possibly have come into France from Spain because the words "pique" and "repique", the main features of the game, are of Spanish origin. The earliest clear mention of the game – leaving aside various predecessors – is in 1585 by Jacques Perrache, described as a "Provençal gentleman", who refers to two unusual games, "premieres, & piquets".
The game was introduced in Germany during the Thirty Years' War, and texts of that period provide substantial evidence of its vogue, like the metaphorical use of the word "repique" in the 1634–8 political poem Allamodisch Picket Spiel ("Piquet Game à la mode"), which reflects the growing popularity of the game at that time. As with other games like Bête, the substantive form of the word "piquet" was turned into a verb and this is used substantially by Rist's 1640 Spiele, die man Picquetten heißet, who gives the word his grudging assent. Historical sources also distinguish between Rummel-Piquet, the normal game in which Rummel referred to the feature of point, and Offenherziges Piquet (lit.: "Open-hearted Piquet"), which was played ouverte. Mizka states that the former was known as Ronfelspiel (French: Ronfler) until 1664.
Until the early twentieth century, piquet was perhaps the most popular card game in France, occupying a similar position to cribbage in England. It first became popular in England after the marriage of Mary I of England to Philip II of Spain in 1554. A partie consists of six deals.
The game was also played as pool precisely according to the rules briefly sketched as above, the penalty for losing being a guinea to the pool. Piquet required much practice to play it well. It became so great a favourite that, by the middle of the 18th century, the meanest people were well acquainted with it, and 'let into all the tricks and secrets of it, in order to render them complete sharpers.' Such are the words of an old author, who adds that the game was liable to great imposition, and he explains the methods in use. Short cards were used for cutting, as in whist, at the time. Of these cards there were two sorts, one longer than the rest; and the advantage gained by them was as the adversary managed it, by cutting the longer or broader, as best suited his purpose, or imposing on the dealer, when it was his turn, to cut those that made most against him. The aces, kings, queens, and knaves were marked with dots at the corners, and in the very old book from which I am quoting precise directions are given how this marking can be effected in such a manner 'as not to be discovered by your adversary, and at the same time appear plain to yourself. With a fine pointed pen and some clear spring water, players made dots upon the glazed card at the corners according to the above method; or they coloured the water with India ink, to make the marks more conspicuous. The work concludes as follows: There are but 32 cards made use of at piquet, so that just half of them will be known to you; and in dealing you may have an opportunity to give yourself those you like best; and if you cannot conveniently change the pack according to your desire, you will commonly know what you are to take in, which is a demonstrative advantage to win any one's money.