This New York Times article reports the discovery of aperiodic tiling in medieval Islamic art. These designs were not understood by Western mathematicians until the 1970s. The article includes pictures of the tilings and a link to the original research paper.
New York Times Company. In Medieval Architecture, Signs of Advanced Math. New York: New York Times Company, November 14, 2008. http://www.nytimes.com/2007/02/27/science/27math.html (accessed 19 June 2013).
%0 Electronic Source %D November 14, 2008 %T In Medieval Architecture, Signs of Advanced Math %I New York Times Company %V 2013 %N 19 June 2013 %8 November 14, 2008 %9 text/html %U http://www.nytimes.com/2007/02/27/science/27math.html
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