iron pillar and arches with intricate in qutub minar complex

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