details of the architecture of the red fort. khas mahal palace

architecture column arch temple palace facade wall window door carving symmetry details red fort walls khas mahal decorated carvings ornaments open doorway taj visible distance india agra palace detail mahal pattern fort islam mughal frame door doorway red heritage mughal art dynasty famous places sightseeing mausoleum design sandstone indian architecture distance heritage india agra marble muslim carved unesco world blue indian islamic history historical wall arch famous historic culture landmark ancient travel old