After the Umayyad campaigns in India and the conquest on small territories of the western part of the Indian peninsula, early Indian Muslim dynasties were founded by the Ghurid dynasty and the Ghaznavids, most notably the Delhi Sultanate. The Indian sultanates did not extensively strive for a caliphate since the Ottoman Empire was already observing the caliphate. Although the Mughal Empire is not recognised as a caliphate, its sixth emperor Muhammad Alamgir Aurangzeb has often been regarded as one of the few Islamic caliphs to have ruled the Indian peninsula. He received support from Ottoman Sultans such as Suleiman II and Mehmed IV. As a memorizer of Quran, Aurangzeb fully established sharia in South Asia via his Fatawa 'Alamgiri. He re-introduced jizya and banned Islamically unlawful activities. However, Aurangzeb's personal expenses were covered by his own incomes, which included the sewing of caps and trade of his written copies of the Quran. Thus he has been compared to the 2nd Caliph Umar bin Khattab and Kurdish conqueror Saladin. Other notable rulers such as Muhammad bin Bakhtiyar Khalji, Alauddin Khilji, Firuz Shah Tughlaq, Shamsuddin Ilyas Shah, Babur, Sher Shah Suri, Nasir I of Kalat, Tipu Sultan, and the Nawabs of Bengal were popularly given the term Khalifa.