Qutb-Minar in red and buff standstone is the highest tower in India. It has a diameter of 14.32 m at the base and about 2.75 m on the top with a height of 72.5 m.
Qutbu’d-Din Aibak laid the foundation of Minar in AD 1199 for the use of the mu’azzin (crier) to give calls for prayer and raised the first storey, to which were added three more storeys by his successor and son-in-law, Shamsu’d-Din Iltutmish (AD 1211-36). All the storeys are surrounded by a projected balcony encircling the minar and supported by stone brackets, which are decorated with honey-comb design, more conspicuously in the first storey.