Qutub Minar in red and buff sandstone is the highest tower in India. Qutub Minar was built in the 13th century, the magnificent tower stands in the capital, Delhi. Qutub Minar has a diameter of 14.32m at the base and about 2.75m on the top with a height of 72.5m.
It is an architectural marvel of ancient India. Surrounding the Qutub Minar are many fine examples of Indian artwork from the time it was built in 1193.
A second tower was in construction and planned to be taller than the Qutb Minar itself.
Its construction ended abruptly when it was about 12 meters tall. The name of this tower is given as Alau Minar and construction of recent studies shows that this structure has been tilted in one direction.
The Qutub Minar complex has a number of other important monuments such as the gateway built in 1310, the Alai Darwaza, Quwwat-ul-Islam Mosque; the tombs of Altamish, Ala-ud-din Khalji and Imam Zamin; the Alai Minar, a 7m high Iron Pillar, etc..