Kasbin Casbin, kazbin, or Casveen, a fortified city of Persia, in the province of Irak-Ajemi, 90 m. N. W. of Teheran, in lat. 36° 12' N., Ion. 49° 53' E.; pop. in 1868 estimated at 25,000. It is surrounded by brick walls with towers, and is said to exceed Teheran in extent; but whatever grandeur it may have once possessed has been destroyed by repeated earthquakes. Whole streets lie in ruins, and most of the ancient buildings have been overthrown. The palace, though much dilapidated, is still occupied by the governor. A mosque with a largo dome, bazaars, schools, and baths are the other principal buildings. The chief manufactures are velvets, brocades, a coarse cotton cloth called kerbas, carpets, sword blades, and wine. Grapes and nuts are produced abundantly, and of good quality. It is also an entrepot for the silks of Ghilan and Shirvan destined for Bagdad and India, and for rice from the Caspian provinces. The surrounding plain was formerly one of the most productive districts of Persia, its natural fertility being greatly enhanced by a vast system of irrigating canals, most of which are now choked up, except in the immediate vicinity of the city. Casbin was founded about the middle of the 4th century, and under the Suffide dynasty became the capital of the kingdom.

The removal of the government to Ispahan checked its prosperity.