Harbiye Cemil Topuzlu Açıkhava Tiyatrosu

The Cemil Topuzlu Open-Air Theatre (Turkish: Cemil Topuzlu Açıkhava Tiyatrosu, also called simply Açıkhava Tiyatrosu) is a contemporary amphitheatre located at Harbiye neighborhood of Şişli district in Istanbul, Turkey. It is situated across from the Istanbul Lütfi Kırdar Convention and Exhibition Center, and behind the Hilton Istanbul Bosphorus on the European side of the city.

As the city's most popular summertime outdoor venue, the theatre primarily hosts music concerts in various genres of local and international performers. It also hosts cultural activities for several festivals held in Istanbul in the summer.
The facade is faced with limestone and Uzunköprü stone interchangeably to achieve a tone of color. The tier seating is of Uzunköprü stone also. The outdoor theatre is designed in the form of ancient amphitheatres with tiered seating for spectators, semicircular in shape, around a flat performance space. The theatre's seating capacity is 3,972, and there are additional 30 "loge" seats for VIP. The section for the orchestra can hold 80 musicians. A movie projector is situated in the middle of the auditorium for movie or slide show purposes. The stage is large enough to enable 200-300 background actors freely move. The passages and the gates are dimensioned for instantaneous evacuation of the stage.