Before the city of Hyderabad was founded the Deccan was ruled from Golconda fort. Founded originally by the Kakatiya's in the 13th century the existing structure was expanded by the Qutub Shahi kings into a massive fort with granite walls and ramparts extending some 5 km in circumference. The fortress city within the walls was famous for the diamond trade and Ko-hi-noor diamond is said to have come from here. This historic Golconda fort lies 11 kms west of the city. The name originates from the telugu words "Golla" and "Konda" - 'shepard's hill'. Later the fort was taken over by the Bhaamani kings, subsequently passing to the Qutub Shahi kings rebuilt Golconda over a span of 62 years.