Kashan (Persian: also Romanized as Kāshān; also known as Kachan) is a city in and the capital of Kashan County, in the province of Isfahan, Iran. At the 2006 census, its population was 248,789, in 67,464 families.
The etymology of the city name comes from Kasian, the original inhabitants of the city, whose remains are found at Tapeh Sialk dating back 9,000 years; later this changed to Kashian, hence the town name. Between the 12th and the 14th centuries Kashan was an important centre for the production of high quality pottery and tiles. In modern Persian, the word for a tile (kashi) comes from the name of the town.
Archeological discoveries in the Sialk Hillocks which lie 4 km west of Kashan reveal that this region was one of the primary centers of civilization in pre-historic ages. Hence Kashan dates back to the Elamite period of Iran. The Sialk ziggurat still stands today in the suburbs of Kashan after 7,000 years.
The artifacts uncovered at Sialk reside in the Louvre in Paris and the New York Metropolitan Museum of Art, and Iran's National Museum.