curtailed the development of state before the Deccan Sultanates allied to achieve victory over Vijayanagar at Talikota in 1565. Bijapur eventually conquered the neighbouring Sultanate of Bidar in 1619. The Portuguese Empire exerted pressure on the major Adil Shahi port of Goa, until it was conquered during the reign of Ibrahim II. The Sultanate was thereafter relatively stable, although it was damaged by the revolt of Shivaji, whose father was Maratha commander in the service of Adil Shah. Shivaji founded an independent Maratha Kingdom which went on to become the Maratha Empire, one of the largest empires in India, just before the British conquered India. The greatest threat to Bijapur's security was, from the late 16th century, the expansion of the Mughal Empire into the Deccan. Although it may be the case that the Mughals destroyed the Adilshahi, it was Shivaji's revolt which weakened the Adilshahi control. Various agreements and treaties imposed Mughal suzerainty on the Adil Shahs, by stages, until Bijapur's formal recognition of Mughal authority in 1636. The demands of their Mughal overlords sapped the Adil Shahs of their wealth until the Mughal conquest of Bijapur in 1686. Historical overview The founder of the dynasty, Yusuf Adil Shah, may have been a Georgian slave who was purchased by Mahmud Gawan from Iran. Yet, Salma Ahmed Farooqui, states, Yusuf was a son of the Ottoman Sultan Murad II. According to the historian Mir Rafi-uddin Ibrahim-i Shirazi, or Rafi''', Yusuf's full name was Sultan Yusuf 'Adil Shah Savah or Sawah'i (from the ancient town of Saveh, southwest of modern Tehran), the son of Mahmud Beg of Sawa in Iran, (Rafi' 36–38, vide Devare 67, fn 2). Rafi's history of the 'Adil Shahi dynasty was written at the request of Ibrahim Adil Shah II, and was completed and presented to the patron in AH 1017. The Indian scholar T.N. Devare mentioned that while Rafi's account of the Bahmani dynasty is filled with anachronisms, his account of the Adilshahi is "fairly accurate, exhaustive, and possesses such rich and valuable information about Ali I and Ibrahim II" (312). Rafi-uddin later became the governor of Bijapur for about 15 years (Devare 316). Yusuf's bravery and personality raised him rapidly in Sultan's favour, resulting in his appointment as the Governor of Bijapur. He built the Citadel or Arkilla and the Faroukh Mahal. Yusuf was a man of culture. He invited poets and artisans from Persia,