Islamic mathematicians & artists discovered the "Penrose tilings" of Quasicrystals hundreds of years before western scientists.
Image 1: Girih-tile subdivision found in the decagonal girih pattern on a spandrel from the Darb-i Imam shrine, Isfahan, Iran (1453 C.E.). A subdivision rule to construct perfect quasi-crystalline tilings has been identified.
Image 2: Quasicrystal type patterns above an arch in the Abbasid al-Mustansiriyya Madrasa in Baghdad, Iraq, 1227
