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.
Ottoman Caliphate
The Ottoman Caliphate (1517–1924), under the Ottoman dynasty of the Ottoman Empire, was the last Sunni Islamic caliphate of the late medieval and the early modern era. During the period of Ottoman growth, Ottoman rulers claimed caliphal authority since Murad I's conquest of Edirne in 1362. Later Selim I, through conquering and unification of Muslim lands, became the defender of the Holy Cities of Mecca and Medina which further strengthened the Ottoman claim to caliphate in the Muslim world.