When was the Golconda Fort founded?

Name: Golconda Fort.
Founder: Kakatiya ruler King Pratāparudra.
Location: Hyderabad, Telangana, India.
Coordinates: 17°22′59″N 78°24′04″E.
Built: 11th century.
Area: 3 square kilometers 4.8k (L).
Height: 120 meters.