View of the Ottoman Neo-Baroque style Ortaköy Mosque and the Bosphorus Bridge.
Istanbul was the final seat of the Islamic Caliphate, between 1517 and 1924, when the Caliphate was dissolved and its powers were handed over to the Turkish Parliament. On 2 September 1925, the tekkes and tarikats were banned, as their activities were deemed incompatible with the characteristics of the secular democratic Republic of Turkey; particularly with the secular education system and the laicist state's control over religious affairs through the Religious Affairs Directorate. Most followers of Sufism and other forms of Islamic mysticism practiced clandestinely afterwards, and some of these sects still boast numerous followers. To avoid the still active prohibition, these organisations represent themselves as "cultural associations."
Inside the Church of St. George, the seat of the Greek Orthodox Patriarchate.