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Development of Islam in Turkey

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By the end of the seventh century, conversion to Islam had begun among the Turkish-speaking tribes, who were migrating westward from Central Asia. The initial wave of Turkish migrants converted to Sunni Islam and became champions of Islamic orthodoxy. As warriors of the Islamic faith, or gazis , they colonized and settled Anatolia in the name of Islam, especially following the defeat of the Byzantines at the Battle of Manzikert (1071). Beginning in the twelfth century, new waves of Turkic migrants became attracted to militant Sufi orders, which gradually incorporated heterodox Shia beliefs. One Sufi order that appealed to Turks in Anatolia after 1300 was the Safavi, based in northwest Iran.

During the fourteenth and fifteenth centuries, the Safavi and similar orders such as the Bektasi became rivals of the Ottomans - who were orthodox Sunni Muslims - for political control of eastern Anatolia. Concern about the growing influence of the Safavi probably was one of the factors that prompted the Ottomans to permit unorthodox Bektasi Sufism to become the official order of the janissary soldiers. Although the Bektasi became accepted as a sect of orthodox Sunni Muslims, they did not abandon their heterodox Shia beliefs. In contrast, the Safavi eventually conquered Iran, shed their heterodox religious beliefs, and became proponents of orthodox Twelve Imam Shia Islam.

The conquest of the Byzantine capital of Constantinople - which the Turks called Istanbul (from the Greek phrase eis tin polin, "to the city") - in 1453 enabled the Ottomans to consolidate their empire in Anatolia and Thrace. The Ottomans revived the title of caliph, based their legitimacy on Islam, and integrated religion into the government and administration. Despite the absence of a formal institutional structure, Sunni religious functionaries played an important political role. Justice was dispensed by religious courts; in theory, the codified system of seriat regulated all aspects of life, at least for the Muslim subjects of the empire.

The head of the judiciary ranked directly below the sultan and was second in power only to the grand vizier. Early in the Ottoman period, the office of grand mufti of Istanbul evolved into that of seyh¸lislam (shaykh, or leader of Islam), which had ultimate jurisdiction over all the courts in the empire and consequently exercised authority over the interpretation and application of seriat . Legal opinions pronounced by the seyh¸lislam were considered definitive interpretations.

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