The construction of the Qutub Minar was started by Aibak.
The Qutub Minar was built in memory of the Sufi saint Qutub-ud-din Bakhtiar Kaki.
The work was completed by Iltutmish.
Its height is 237.8 feet.
The entrance to the Qutub Minar is the Alai Darwaza.
