Qutb Minar, the highest tower in India, is built in red and buff sandstone. It has been included in the UNESCO World Heritage List as the highest stone tower in India.

In the tower one can see numerous inscriptions in Arabic and Nagari characters. It stands as an important example of Indo-Islamic architecture.

The Iron Pillar in the complex of Qutb courtyard bears the inscriptions in Sanskrit in Brahmi script of fourth century AD. The Qutb complex is located at Mehrauli in South Delhi, India.