Golconda Fort

Golconda is a fortified citadel and ruined city located on the outskirts of Hyderabad, India, originally built by Kakatiya ruler Pratāparudra in the 11th century. The fort was ceded to the Bahmani Kings and later became the capital of the Golconda Sultanate under Sultan Quli, who fortified the city and made it a major trade center for large diamonds. The fort remained the capital of the Qutb Shahi dynasty until 1590, when the capital was shifted to Hyderabad, and it was finally captured by the Mughal emperor Aurangzeb in 1687.learn more on wikipedia