Ottoman imperial style was not dominated but inspired by other cultures in the course of centuries, such as the Chinese, Mongolian, Persian, Arab, as well as the Byzantine, Hungarian, Italian, and Austrian. The Sultan's court was the melting pot for all of these influences.
Ottoman male dress of high rank was distinguished by features such as length, colors, and patterns. Other than the turban, dress in the court consisted of a shirt (gomlek), inner garment (entari), sash (kusak) or metal belt (kemer), baggy trousers (salvar), outer garment (kaftan) which was an overcoat usually lined with fur, high boots (basmak), and shoes (mest)
A good reference to start on the subject is:
Zygulski Jr., Zdzislaw. Ottoman Art: In the Service of the Empire. New York:New York Press, 1992.
Some selected examples (please click on pictures to enlarge):