This post is in addition to the earlier post.
Decagonal quasicrystal geometry, first understood by Westerners in recent decades, appears in 15th-century Islamic tilings
Cambridge, Mass. – February 22, 2007 – Intricate decorative tilework found in medieval architecture across the Islamic world appears to exhibit advanced decagonal quasicrystal geometry — a concept discovered by Western mathematicians and physicists only in the 1970s and 1980s. If so, medieval Islamic application of this geometry would predate Western mastery by at least half a millennium.