An ace is a playing card. In the standard French deck, an ace has a single suit symbol located in the middle of the card, sometimes large and decorated, especially in the case of the Ace of Spades. This embellishment on the Ace of Spades started when King James VI of Scotland and I of England required an insignia of the printing house to be printed on the Ace of Spades. This insignia was necessary for identifying the printing house and stamping it as having paid the new tax. Although this requirement was abolished in 1960, the tradition has been kept by many card makers.
Wikipedia contributors, "Ace," Wikipedia, The Free Encyclopedia, http://en.wikipedia.org/wiki/AceABOUT THE ENGLISH LANGUAGE