 Sufi orders which were so widespread in the Islamic world and who had many followers who had actively participated in the conquest of the city came to settle in the capital.During Ottoman times over 100 Tekkes were active in the city alone.Many of these Tekkes survive to this day some in the form of mosques while others as museums such as the Jerrahi Tekke in Fatih, the Sunbul Effendi and Ramazan Effendi Mosque and Turbes also in Fatih, the Galata Mevlevihane in Beyoğlu, the Yahya Effendi Tekke in Beşiktaş, and the Bektashi Tekke in Kadıköy, which now serves Alevi Muslims as a Cem Evi.