sandstone brick pattern on the wall of qutub minar

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