In early games the kings were always the highest card in their suit. However, as early as the late 15th century special significance began to be placed on the nominally lowest card, now called the Ace, so that it sometimes became the highest card and the Two, or Deuce, the lowest. The term "Ace" itself comes from a dicing term in Anglo-Norman language, which is itself derived from the Latin as (the smallest unit of coinage). Another dicing term, trey , sometimes shows up in playing card games. Many governments used to raise revenue by imposing a stamp duty on playing cards. As the Ace card has the most blank space, it was usually chosen as the place to bear the stamp which proved the tax was paid. This led to elaborate designs of certain ace cards: the ace of spades in England, the ace of clubs in France, and the ace of diamonds in Russia.