, modern Turkish Yenişehir, a town of northwestern Anatolia, in what was the classical Bithynia. It lies in lat. 40° 17’ N. and long. 29° 38’ E. at an altitude of 245 m/800 feet in a long depression running from Inegöl in a northeasterly direction, where this narrows; this plain is drained by the Gök Su, whose waters are used here for irrigation purposes and which flows past Yeñi S̲h̲ehir into the Sakarya river [q.v.].

Yeñi S̲h̲ehir played an important role in early Ottoman history. It was the first town of significance to be taken at some point in the early 8th/14th century by ʿOt̲h̲mān I [q.v.], w…