Count Leon Ostrorog is a French originally of Polish descent. Count Ostrorog, a Sorbonne graduate Islamic lawyer, meets the son of Arab Izzet Pasha while he is studying at the university, comes to Istanbul at his invitation and likes this city very much. Count Ostrorog, who speaks 7 languages in addition to Turkish, Arabic and Persian, is appointed to the legal counsel at the Ministry of Justice.
The red painted mansion where he lived in Kandilli dates back to the 1780s. First, in the mansion where Halil Pasha and his family lived, then the Minister of Foreign Affairs (Minister of Foreign Affairs of the time) Server Pasha lived..
In the early 1900s, Count Ostrorog bought the mansion, and in 1905 it combined it with Ahmet Aşkî Pasha's mansion and expanded it. The two-storey mansion has 15 rooms.
Count Ostrorog, who served three sultans, witnessed the collapse of the Ottoman Empire and the foundation of the Republic..
There is a 200-year-old fountain and a pine tree in the garden of the mansion, which has a neo-classical architectural style. The mansion, which has a European style outside of the Ottoman Empire, gathered artists, intellectuals of the Ottoman and the young republic, and talks with music and literature were organized..
The Ostrorog family hosted many distinguished people such as the former President of France Georges Pompideu, the Danish Princess Margarite, and the writer Pierre Loti in the mansion.
The current owner of the mansion is the Koç family
