Delhi’s history is often spoken of in terms of its seven cities. These were fortified settlements, established by various rulers between the 11th and 17th centuries, now swallowed by the sprawling city of today. The sixth Delhi is the Purana Qila, or Old Fort, a 16th-century stone fort near the eastern edge of the city, and a particularly good place from which to tell the story of Delhi’s urban development.Old Fort of Delhi is a fascinating building that survived the ravages of time. The Old Fort or the Purana Qila is also known as the ‘Qila-i-kuhna masjid’ built by Sher Shah Suri in 1541. Old Fort at Delhi is a perfect example of Lodi style of architecture in Delhi. The architecture of the Old Fort of Delhi is a fine blend of the Hindu elements together with the Muslim style of arches and domes. In short the style of architecture of the Old Fort can be considered as a secular architectural style.
