The City Museum, located within the gar-dens of the Yildiz Palace, preserves and documents the history of Istanbul since the Ottoman conquest. (Open every day except Thursday). Also within the gardens are the Yildiz Palace Theatre and the Museum of Historical Stage Costumes, with its richly decorated scenery and stage , and its exquisite costumes. (Open every day except Tuesday).

   The Rahmi Koç Industry Museum, in the suburb of Hasköy on the coast of the Golden Horn, was an Ottoman-period building, formerly called Lengerhane, for iron and steel works. Today it houses exhibits on industrial development. (Open every day except Monday).