The Cemil Topuzlu Open-Air Theatre 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.HistoryThe construction of the open-air theatre was proposed by French urban planner Henri Prost (1874–1959), who developed a project for Istanbul in the 1930s. Designed by Turkish architects Nihad Yücel and Nahid Uysal, the groundbreaking took place in July 1946, in the office time of Lütfi Kırdar (1887-1961), governor and mayor of Istanbul.The amphitheatre was opened on August 9, 1947 with a ceremony. However, it took its final form after German stage director Carl Ebert (1887–1980), then head of Ankara State Conservatory, made modifications in the architectural design of the stage area. Remedy of all the deficiencies completed in the 1950s only. The construction cost 900,000 at the end.