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Krishnadevaraya (17 January 1471 — 17 October 1529) was an emperor of the Vijayanagara Empire reigning from 1509 to 1529. He was the third monarch of the Tuluva dynasty, and is considered to be one of the greatest rulers in Indian history. He ruled the largest empire in India after the fall of the Islamic Delhi Sultanate. Presiding over the empire at its zenith, he is regarded as an icon by many Indians. Krishnadevaraya earned the titles Andhra Bhoja (lit. " Bhoja of Andhra"), Karnatakaratna Simhasanadeeshwara (lit. "Lord of the Jewelled Throne of Karnataka"), Yavana Rajya Pratistapanacharya (lit. "Establishment of the King to Bahmani Throne"), Kannada Rajya Rama Ramana (lit. "Lord of the Kannada Empire), Gaubrahmana Pratipalaka (lit. "Protector of Brahmins and Cows") and Mooru Rayara Ganda (lit. "Lord of Three Kings"). He became the dominant ruler of the peninsula by defeating the sultans of Bijapur, Golconda, the Bahmani Sultanate and the Gajapatis of Odisha, and was one of the most powerful Hindu rulers in India.

Krishnadevaraya's rule was characterised by expansion and consolidation. This was the time when the land between the Tungabhadra and Krishna river (the Raichur doab) was acquired (1512), ruler of Odisha were subdued (1514) and severe defeats were inflicted on the Sultan of Bijapur (1520).

When the Mughal Emperor Babur was taking stock of the potentates of north India, he rated Krishnadevaraya the most powerful, with the most extensive empire in the subcontinent. The Portuguese travellers Domingo Paes and Duarte Barbosa visited the Vijayanagara Empire during his reign, and their travelogues indicate that the king was not only an able administrator but also an excellent general, leading from the front in battle and even attending to the wounded. On many occasions, the king changed battle plans abruptly, turning a losing battle into victory. The poet Mukku Timmanna praised him as the 'Destroyer of the Turks.' Krishnadevaraya benefited from the counsel of his prime minister Timmarusu, whom he regarded as the father figure responsible for his coronation. Krishnadevaraya was also advised by the witty Tenali Ramakrishna, who was employed in his court.