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Showing posts from October, 2010

Just Fallen Short

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Quasi-periodicity in 15 th century Islamic Art and whether it actually has been developed as a concept is still a matter of a somewhat controversial debate. There are three sites in the city of Esfahan which have been studied in this regard in considerable detail, two rather small patterns on a spandrel and a portal on the Darb-i Imam shrine in the Dardasht quarter of the old city (1453) and a huge pattern on the western iwan of the Great Mosque. Several authors have, in the meantime, tried to overlie Penrose patterns of kites and darts or thick and thin rhombuses in order to prove that medieval artisans were able to apply what had been described by Roger Penrose only five centuries later. See, for example, Lu and Steinhardt (2007), their response to some additional work by Makovicky (2007), or Cromwell (2008) here , here , and here . However, while a certain desire for subdivision and self-similarity can easily be traced on the respective buildings, it is not perfect, in particular

Intricate Patterns

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Mathematic breakthroughs in the 10 th and 11 th centuries in Baghdad and, for instance, Esfahan may have resulted during the 15 th century in an explosion of Islamic Art and Architecture. In particular the use of so called girih tiles, that is a set of polygonal prototiles with well-defined decorating lines may have allowed medieval artists in Iran and Central Asia to create decagonal tessellations with, in few cases, Penrose-similar patterns. Between the mid-14 th and early 16 th centuries, the Timurids ruled over much of the Islamic world. The highly sophisticated and strictly geometric (‘Islamic’) patterns on glazed tiles covering buildings and monuments became later more and more floral. Exquisite examples of this changing style can be seen in Esfahan's Grand Mosque and Darb-i Imam , Mashhad’s Gohar Shad mosque , or the Friday Mosque in Yazd . The Timurids were repelled in Iran by the rulers of the Safavid dynasty (1501–1736 CE) who established the Shi’a branch of Islam