firoz shah tughlaq tomb history

historic religion mughal architecture ancient history heritage old india tomb stone landmark culture building tourism column mehrauli monumentintricate 1200ce delhi brick design architectural sandstone kutub 1220 muslim minaret red pillar qutub 73m minar marble qutb ornate iltutmish tall tower complex firoz site shah tughlaq sultanate qutubuddin unesco world aibak calligraphy tree