Siri Fort
Siri Fort, in the city of Delhi, was built during the rule of Alauddin Khalji, second ruler of Khalji Dynasty, of Delhi Sultanate to defend the city from the onslaught of the Mongols. It was the second of the seven cities of medieval Delhi built around 1303 which at present is seen only in ruins with a few remnants due to its poor quality construction as compared to previous fort constructions in India (pictured).