Alai Darwaza is an important architectural addition to the Qutub Minar complex, constructed by Sultan Alauddin Khalji in 1311 CE as part of his ambitious expansion of the Quwwat-ul-Islam Mosque. The gateway marks a major transition in Indian architecture through its use of true Islamic arches, domes and intricate calligraphic carvings. Built with red sandstone and white marble, it showcases remarkable craftsmanship and balanced proportions. Its features, including latticed windows and geometric ornamentation, reflect a refined Indo-Islamic style. Serving as the main entrance to the Qutub complex, it became a significant symbol of the Sultan’s architectural vision.