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Science 30 November 2007:
Vol. 318. no. 5855, p. 1383
DOI: 10.1126/science.1146262
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Technical Comments

Comment on "Decagonal and Quasi-Crystalline Tilings in Medieval Islamic Architecture"

Emil Makovicky

Lu and Steinhardt (Reports, 23 February 2007, p. 1106) claimed the discovery of a large, potentially quasi-crystalline Islamic tiling in the Darb-i Imam shrine but regard the earlier Maragha tiling, previously described as quasiperiodic, as a small isolated motif. We demonstrate that the Darb-i Imam pattern is periodic and that the quasi-crystalline discs superimposed on its lattice are derivatives of the Maragha pattern.

Department of Geography and Geology, University of Copenhagen, Oestervoldgade 10, Copenhagen DK1350, Denmark. E-mail: emilm{at}geol.ku.dk

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Science. ISSN 0036-8075 (print), 1095-9203 (online)