The Deccan sultanates were five dynasties of various ethnic backgrounds (mainly Central Asian Turks) that ruled late medieval kingdoms, namely, Bijapur, Golkonda, Ahmadnagar, Bidar, and Berar in south-western India. The Deccan sultanates were located on the Deccan Plateau, between the Krishna River and the Vindhya Range. These kingdoms became independent during the break-up of the Bahmani Sultanate. In 1490, Ahmadnagar declared independence, followed by Bijapur and Berar in the same year. Golkonda became independent in 1518 and Bidar in 1528. In 1510, Bijapur repulsed an invasion by the Portuguese against the city of Goa, but lost it later that year.