Explanation : The Alai Darwaza. the main gateway from the southern side of the Quwwat-ul-Islam Mosque in the Qutb Minar complex. was the first building in India to employ Islamic architecture principles in its construction and ornamentation. It was built by the second Khalji Sultan of Delhi. Alauddin Khalji in 1311 AD. The domed gateway is decorated with red sandstone and inlaid white marble decorations, inscriptions in Naskh script and latticed stone screens. It is also noted for the use of horseshoe arch and true dome for the first time. ....Read more