Red Fort, famously known as Lal Qila, was constructed by the Mughal emperor Shah Jahan in the walled city of Old Delhi. The Qila actually served as the residence of the Mughal Emperors. Until 1857 it served as the capital of the Mughals. The very high level of art form and ornamental work can be seen on the walls of the Qila. The Persian, European and Indian art work in the fort makes it amazingly beautiful. Being one of the important building complexes of India, the Qila was designated as a UNESCO World Heritage Site in 2007.