Qutb Minar, also often written as Qutub Minar, at 74 meters, is the second tallest minar in India after Fateh Burj in Chappar Chiri at Mohali, which measures 100 meters in height. Qutb Minar, along with the ancient and medieval monuments surrounding it, form the Qutb Complex, which is a UNESCO World Heritage Site. The tower is located in the Mehrauli area of Delhi, India. Made of red sandstone and marble, Qutb Minar is a 73 meter (240 feet) tall tapering tower with a diameter measuring 14.32 meters (47 feet) at the base and 2.75 meters (9 feet) at the peak. Inside the tower, a circular staircase with 379 steps, leads from the bottom to the top storey. Entry to the tower has remained restricted since 1981, when a stampede inside Qutb Minar left 45 visitors dead.