isfahan

Isfahan (historically also rendered as Ispahan or Hispahan, Old Persian: Aspadana, Middle Persian: Spahan, Persian: اصفهان Esfahan), located about 340 km south of Tehran is the capital of Esfahan Province and Iran's third largest city (after Tehran and Mashhad). Esfahan City had a population of 1,583,609 and the Esfahan metropolitan area had a population of 3,430,353 in the 2006 Census, the second most populous metropolitan area in Iran after Tehran.

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Magnificent Old Persian Architecture, Western were only able to discover the extremely complex mathematical relations applied to build such amazing geometries after 20th century!