"Qutub Minar Complex Delhi'sQutub Minar, at 72.5 meters or 238 feet tall, is the tallest tower in India. Built as an Islamic monument inthe early 13th century of red sandstone and marble, the minar is not without controversy. Some believethe tower was builtto celebrate Muslim rule in the country,and others claim it was erected to call the devoted to prayer. The surrounding complex houses the first mosque to be built in India, tombs, a madrassa, and an iron pillar that is mysteriously resistant to corrosion, even after being exposed to the natural elements for centuries. Until 1981, visitors were able to climb the 379 stairs to the top of Qutub Minar, but the interioris now closed."