Kont Ostrorog Yali is the most beautiful and historical building on the Bosphorus. The Polish-born Leon Ostrorog an expert in islamic law, served as a consultant to the Ottoman Empire. He married Jeanne, a daughter of one of the Galata bankers, the Lorando family. Among his famous guests was the French writer Pierre Loti. The present owner of the house is Rahmi Koç.