Khooni Darwaza, which means “bloodstained door”, was constructed by Sher Shah Suri, who established the Sur Empire after defeating the second Mughal ruler Humayun. He ruled North India for 16 years before Humayun recaptured the throne. During the Mughal period, Khooni Darwaza became notorious for exhibiting decapitated heads of criminals. Emperor Aurangzeb even put his elder brother’s head on display here after he revolted against his father Shah Jahan. This was also the site where the British shot three Mughal princes’ in cold blood after the rebellion of 1857.