the Ghaznavid period, Lahore and Uch were established as centres of Persian literature. Abu-al-Faraj Runi and Masud Sa'd Salman (d. 1121) were the two earliest major Indo-Persian poets based in Lahore. The earliest of the "great" Indo-Persian poets was Amir Khusrow (d. 1325) of Delhi, who has since attained iconic status within the Urdu speakers of the Indian subcontinent as, among other things, the "father" of Urdu literature. Delhi sultanate and the Mughal era Indo-Persian culture flourished during the period of the Delhi Sultanate (1206–1526). The invasion of Babur in 1526, the end of the Delhi Sultanate, and the establishment of what would become the Mughal Empire would usher the golden age of Indo-Persian culture with particular reference to the art and architecture of the Mughal era. During the Mughal era, Persian persisted as the language of the Mughals up to and including the year 1707 which marked the death of the Emperor Aurangzeb, generally considered the last of the "Great Mughals". Thereafter, with the decline of the Mughal empire, the 1739 invasion of Delhi by Nader Shah and the gradual growth initially of the Hindu Marathas and later the European power within the Indian subcontinent, Persian or Persian culture commenced a period of decline although it nevertheless enjoyed patronage and may even have flourished within the many regional empires or kingdoms of the Indian subcontinent including that of the Sikh Maharaja Ranjit Singh (r. 1799–1837). Persian as a language of governance and education was abolished in 1839 by the British East India Company and the last Mughal emperor Bahadur Shah Zafar, even if his rule was purely symbolic or ceremonial, was dethroned in 1857 by the British. Further, C.E. Bosworth writes about the significance of Persian culture that developed a mark within Muslim sultans in this era that: "The sultans were generous patrons of the Persian literary traditions of Khorasan, and latterly fulfilled a valuable role as transmitters of this heritage to the newly conquered lands of northern India, laying the foundations for the essentially Persian culture which was to prevail in Muslim India until the 19th century." Deccan The Deccan region's integration into the Indo-Persian culture of the north began in the early 14th century, when the Delhi Sultanate made political movements towards the south, and the Deccan was brought into the Sultanate under the conquests of the Tughluq dynasty. Due to the Sultan Muhammad Shah policy of