Turkish music incorporates diverse elements from Central Asian, Byzantine, Ottoman, Persian, Balkan, and European influences. It has roots dating back to the 11th century Seljuk Empire and contains Turkic and pre-Turkic influences. Modern Turkish popular music emerged in the early 1930s as part of a drive for Westernization. Traditional musical instruments include the kanun, doombec, zills, saz, and tar. Famous dances include the Horon, Zeybek, and Whirling Dervishes' sema ceremony which represents union with God.