Eskişehir (ĕskēˈshĕhērˌ) [key], city (1990 pop. 413,305), capital of Eskişehir prov., W central Turkey. An important industrial center, its manufactures include refined sugar, cement, railroad equipment, textiles, chemicals, and meerschaum products. It is noted for its hot mineral springs. Godfrey of Bouillon defeated the Seljuk Turks there in 1097. The city's modern development dates from the coming of the railroad (1894). Eskişehir is on or near the site of ancient Dorylaeum.