08/04/2012 at 11:50 AM
660-670, China: First example of printing on paper. Early xylography was accomplished with hemp paper and woodblocks.
Dominoes are a Chinese invention; our western dominoes are a copy of theirs. Dominoes are, in turn, a representation of all possible combinations of a roll of two dice. There are 21 possible combinations, and with a blank tile that makes 22 unique dominoes.
In China, there is little distinction between gaming tiles made of bone or plastic and gaming cards made of paper. The same games are played with both types of gaming pieces, and they are used interchangeably.
Some scholars think that dominoes are the progenitors of money cards, and some have even tried to argue that the number 22 ties dominoes to the trumps of a Tarot deck.