Manisa (mänēsäˈ) [key], city (1990 pop. 158,283), capital of Manisa prov., W Turkey. It is a rail junction and the market center of a rich agricultural region. Mineral deposits are nearby. The city has many fine buildings, among them the notable Muradye mosque, and was the residence of Ottoman sultans Murad II and Murad III. The ruins of ancient Magnesia ad Sipylum are nearby.