geometry garret, tilings, regular tilings, uniform tilings, rhombs, rhombi, tilings by rhombs, rosettes, Penrose tilings, pseudo-Penrose tilings, Conway town theorem, Penrose Sun, Penrose Star, Penrose Cartwheel, de Bruijn mesh, Conway worms, Cal Arts, arbelos, shoemaker's knife, gingko leaf, John A. Volpe Center, NASA/Electronics Research Center, Robert Ammann, Archimedes, David Aubertin, David Austin, F.P.N.Beenker, Kenneth Brakke, Nicolaas G. de Bruijn, Sergei E. Burkov, Stephen Collins, John Horton Conway, H.S.M.