In the 13th century, in the central city of Konya on the Anatolian Plateau, the mystic Selaleddin Rumi founded the first dervish music and dance group in Islam, the May. Flavi has trained a large number of musicians. Mystic religious rituals gave rise to many musical genres that are still popular throughout the Middle East, such as the two most important instrumental ensemble forms of Turkish art music - Peshlev and Semai. Since the 15th century, with the continuous expansion of the Ottoman Empire, in order to boost military power and boost morale, huge Guards military bands - Mehthana - were set up in various legions of the empire, thus military music developed greatly. Ottoman military music is also used in ordinary festivals and various entertainment activities. It has become a major feature of Turkish music and has had a great influence on professional music creation in Europe.