Kuleli Military High School, One of the important historical locations in the Üsküdar district, lying between Çengelköy and Vaniköy, is the Kuleli Military High School. There hes been a building here from the Time of Sultan Mehmed II. When Sultan Mehmed II conquered Constantinople there was a wood here, known as Papaz Korusu (Priest Wood). In the wood there was a monastery and a tower. During the reign of Sultan Selim I (1512-1520), this monastery was converted into a Janissary barracks. The location the barracks was originally called Bostancıbaşı odaları. Later, after being transformed into a beautifully decorated garden, it began to be called Kuleli Bahçesi (Garden with towers). Kuleli Garden was used for growing flowers and plants and Sultan Suleyman the Magnificent used the come here when he was a prince.
When Suleyman became sultan (1520- 1577), the built a mansion in the garden; this consisted of nine floors. Each floor was furnished with a pool. This was used as the royal residence in the summer months. During the reign of Sultan Ahmed III (1703-1730), the tower and its surroundings were given to the sultan. In the era of Sultan Abdülmecid, a new stone building was built in place of the barracks (1843). After this period, the location was known as the Kuleli Barracks because of the two towers located at the sides of the building.
During the reign of Abdulaziz (1861-1876), the main walls of the barracks were built out of concrete, while the interior and the floors and ceiling were made out of wood (1871). The newly built barracks consisted of two floors. Today these serve as barracks for the military school.
During the World War I, the school was transferred for a semester to the Greek Orphanage in the island of Büyükada. At the end of World War I, the school building was evacuated in accord with the demands made by the English in the Armistice of Mudors. The building was then given to Armenian orphans and immigrants (November 5, 1920). After the victorious end of the “Büyük Taaruz” (Great Attack), which started on August 26, 1922 and with the Treaty of Lausanne, the British left Kuleli Barracks to Turkish officials. Thus, after an intervel of three years, the school returned to its former building on September 6, 1923.
With the Tevhid- i Tedrisat (the unification of education) law, the school was turned into a civilian high school and its named was changed to Kuleli Military High School. At the end of the semester the same year the school was converted back into a military school. In 1925, Kuleli High School took on the structure it has today.