Ludhiana (lʊdiˈɑːnə ) is the most populous and the largest city in the Indian state of Punjab. The city has an estimated population of 1,618,879 2011 census and distributed over , making Ludhiana the most densely populated urban centre in the state. It is a major industrial center of Northern India, referred to as "India's Manchester" by the BBC. It is also known as the Commercial capital of Punjab. It stands on the old bank of Sutlej River, that is now to the south of its present course. The Union Ministry of Housing and Urban Affairs has placed Ludhiana on the 48th position among the top 100 smart cities and has been ranked as one of the easiest cities in India for business according to the World Bank. Ludhiana was founded in 1480 by members of the ruling Lodhi dynasty of the Delhi Sultanate. The ruling sultan, Sikandar Lodhi, dispatched two ruling chiefs, Yusuf Khan and Nihad Khan, to re-assert Lodhi control. The two men camped at the site of present Ludhiana, which was then a village called Mir Hota. Yusuf Khan crossed the Sutlej and established Sultanpur, while Nihad Khan founded Ludhiana on the site of Mir Hota. The name was originally Lodhi-ana", meaning "Lodhi town", which has since shifted from "Lodiana" to the present form of Ludhiana. The Lodhi Fort, or "Purana Qila", is the only surviving structure in the city from this period; located in the neighbourhood of Fatehgarh, it was well-maintained under Ranjit Singh and the British after him, but then fell into disrepair. It was declared a state-protected monument in December 2013. The Semi Centennial Celebration of the American Presbyterian Lodiana Mission was held in Ludhiana from 3–7 December 1884. Ludhiana's Old City includes landmarks like the Lodhi Fort, Daresi Grounds, The Clock Tower, & Sood Family Haveli. Ludhiana is located at . It has an average elevation of . Ludhiana City, to its residents, consists of the Old City and the New City. The new city primarily consists of the Civil Lines area which was historically known as the residential and official quarters of the colonial British encampment.