Ala-i-Darwaza, New Delhi, Delhi India

 The Alai Darwaza is the main gateway from southern side of the Quwwat-ul-Islam Mosque. It was built by the second Khilji Sultan of Delhi, Ala-ud-din Khilji in 1311 AD, who also added a court to the pillared to the eastern side. The domed gateway is decorated with red sandstone and inlaid white marble decorations, inscriptions in Naskh script, latticed stone screens and showcases the remarkable craftsmanship of the Turkic artisans who worked on it. This is the first building in India to employ Islamic architecture principles in its construction and ornamentation.