Turkish, Iranian and Indian empires (1030–1918)

The Seljuk Turks conquered Abbassid lands and adopted Islam and become the de facto rulers of the caliphate. They captured Anatolia by defeating the Byzantines at the Battle of Manzikert, thereby precipitating the call for Crusades. They however fell apart rapidly in the second half of the 12th century giving rise to various semi-autonomous Turkic dynasties. In the 13th and 14th centuries the Ottoman empire (named after Osman I) emerged from among these "Ghazi emirates" and established itself after a string of conquests that included the Balkans, parts of Greece, and western Anatolia. In 1453 under Mehmed II the Ottomans laid siege to Constantinople, the capital of Byzantium, which succumbed shortly thereafter, having been overwhelmed by a far greater number of Ottoman troops and to a lesser extent, cannonry.^[91]

Beginning in the 13th century, Sufism underwent a transformation, largely as a result of the efforts of al-Ghazzali to legitimize and reorganize the movement. He developed the model of the Sufi order — a community of spiritual teachers and students.^[92] Also of importance to Sufism was the creation of the Masnavi, a collection of mystical poetry by the 13th century Persian poet Rumi. The Masnavi had a profound influence on the development of Sufi religious thought; to many Sufis it is second in importance only to the Qur'an.^[93]

In the early 16th century, the Shi'i Safavid dynasty assumed control in Persia and established Shi'a Islam as an official religion there, and despite periodic setbacks, the Safavids remained powerful for two centuries. Meanwhile, Mamluk Egypt fell to the Ottomans in 1517, who then launched a European campaign which reached as far as the gates of Vienna in 1529.^[95] After the invasion of Persia, and sack of Baghdad by the Mongols in 1258, Delhi became the most important cultural centre of the Muslim east.^[96] Many Islamic dynasties ruled parts of the Indian subcontinent starting from the 12th century. The prominent ones include the Delhi Sultanate (1206–1526) and the Mughal empire (1526–1857). These empires helped in the spread of Islam in South Asia, but by the early-18th century the Maratha empire became the pre-eminent power in the north of India. By the mid-18th century the British empire had formally ended the Mughal dynasty,^[97], and at the end of the 18th century overthrew the Muslim-ruled Kingdom of Mysore. In the 18th century the Wahhabi movement took hold in Saudi Arabia. Founded by the preacher Ibn Abd al-Wahhab, Wahhabism is a fundamentalist ideology that condemns practices like Sufism and the veneration of saints as un-Islamic.^[98]

By the 17th and 18th centuries, despite attempts at modernization, the Ottoman empire had begun to feel threatened by European economic and military advantages. In the 19th century, the rise of nationalism resulted in Greece declaring and winning independence in 1829, with several Balkan states following suit after the Ottomans suffered defeat in the Russo-Turkish War of 1877–1878. The Ottoman era came to a close at the end of World War I and the Caliphate was abolished in 1924.^[99][100]

In the 19th century, the Salafi, Deobandi and Barelwi movements were initiated.