In 1565, Karnataka and the rest of South India experienced a major geopolitical shift when the Vijayanagara empire fell to a confederation of Islamic sultanates in the Battle of Talikota. The Bijapur Sultanate, which had risen after the demise of the Bahmani Sultanate of Bidar, soon took control of the Deccan; it was defeated by the Moghuls in the late 17th century. The Bahmani and Bijapur rulers encouraged Urdu and Persian literature and Indo-Saracenic architecture, the Gol Gumbaz being one of the high points of this style. During the sixteenth century, Konkani Hindus migrated to Karnataka, mostly from Salcette, Goa, while during the seventeenth and eighteenth century, Goan Catholics migrated to North Canara and South Canara, especially from Bardes, Goa, as a result of food shortages, epidemics and heavy taxation imposed by the Portuguese.