Qutub Minar in Delhi, India.
The foundations of this world famous tower, known as the Qutub Minar were laid by Qutub-Uddin-Aibak of the Mamluk dynasty towards the end of the 12th century. The construction was interrupted at the 1st storey by his death, and the remaining 3 storeys were completed in matching material and style by his successor Iltutmish commonly known as Altamash in 1230 A.D. In 1368 A.D. the minar was damaged by lightning. Later, Firoz Shah Tughlaq (1351-88 A.D.) replaced the top storey with the existing 2 storeys faced with marble.
The tower has a diameter of 14.32m at the base and of about 2.75m at the top with a height of 72.5m and ascended by 379 steps. It is the highest stone tower in India and a perfect example of a minar anywhere in the world.