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 architecture
Ottoman architecture is the architecture of the Ottoman Empire which emerged in Bursa and Edirne in 14th and 15th centuries. The architecture of the empire developed from the earlier Seljuk architecture and was influenced by the Byzantine architecture, Armenian architecture, Iranian as well as Islamic Mamluk traditions after the conquest of Constantinople by the Ottomans. For almost 400 years Byzantine architectural artifacts such as the church of Hagia Sophia served as models for many of the Ottoman mosques. Overall, Ottoman architecture has been described as Byzantine influenced architecture synthesized with architectural traditions of Central Asia and the Middle East.