Julien Jallaleddine Weiss and the Al-Kindi Ensemble, the Byzantine Choir Tropos, the muezzin from the Sultan Fethi mosque, Sheikh Habboush and the Munshids of the Sufi orders of Qaderi and Rifai and the Whirling Dervishes Mawlawi. More than 40 participants in a fascinating evening of liturgical and Sufi music.