Islam in the Ottoman Empire
Islam was the official religion of the Ottoman Empire. The highest position in Islam, "caliphate", was claimed by the sultan, after the defeat of the Mamluks which was established as Ottoman Caliphate. The Sultan was to be a devout Muslim and was given the literal authority of the Caliph. Additionally, Sunni clerics had tremendous influence over government and their authority was central to the regulation of the economy. Despite all this, the Sultan also had a right to decree, enforcing a code called Kanun (law) in Turkish. Additionally, there was a supreme clerical position called the Sheykhulislam ("Sheykh of Islam" in Arabic). Minorities, particularly Christians and Jews but also some others, were mandated to pay the jizya, the poll tax as mandated by traditional Islam.
Demographics of the Ottoman Empire
According to the 1874 census,there were 963596 (42,22%) Muslims and 1318506 (57,78%) non-Muslims in the Danube Province excluding Nış sanjak. Together with the sanjak of Nish the population consisted of 1055650 (40,68%) Muslims and 1539278 (59,32%) non-Muslims in 1874. Muslims were the majority in the sanjaks of Rusçuk, Varna and Tulça, while the non-Muslims were in majority in the rest of the sanjaks.