Qutub-Minar is situated in Delhi, the capital city of India. It is the highest tower in India. It is made of red and buff standstone. It was built in the 13th century. It has a diameter of 14.32m at the base and about 2.75m on the top with a height of 72.5m. Qutub-ud-Din Aibak of Slave Dynasty laid the foundation of the Minar in 1199 for the use of 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, Shams-ud-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.