who riped tiles first

[davidpsy]

now this might sound nooby but i was playing my zelda rom game. and i noticed how the graal tiles look a lot like the zelda tiles so i take a snap shot of the zelda game and to my surprise the zelda tiles are also 16 by 16 and they look a lot alike wich make be beleave that ithe graal riped the tiles from zelda or zelda riped from graal. what do you think