KASTAMOUNI, or COSTAMBONE, a town in Anatolia, in Asia Minor, in N. Lat. 41.22, and E. Long. 33.55, about 230 miles E. of Constantinople, 115 miles N.N.E. of Angora, 50 miles S. of the Black Sea, and situated 2350 feet above the sea level. It stands in a dreary hollow, from which rises a solitary rock surmounted by a fortress in ruins. The houses are two stories high, but ill-built, and the streets are both dirty and narrow. The town contains 30 mosques, 4 monasteries, and 24 baths. The trade, which is considerable, consists in wool, copper, cotton, and sails for shipping. It is said there are 32 printing-houses for cotton, 22 dyeing houses, and 2 tanneries. During the Greek empire, the fortress was in possession of the Comneni. It was taken by Bajazet, retaken by Timour, and, lastly, conquered by Mohammed I. Pop. 48,000.