Sultan Bayezid II Health Complex, also known as Dar al-Shifa, has great importance in the history of the Ottoman Empire, as it was the largest health complex concerned with the treatment of health diseases in the world in the fifteenth century, when ancient Greek myths were still dominating the world’s thought and portraying mental illness as inhabiting demons. The human. The doctors of the complex used various techniques to treat mental and neurological diseases such as music, perfume, painting and other pioneering methods in treating their patients.