The capital is the great combination of old and new world. The old side, it has old architectural sites, buzzing streets and exotic markets with more than 20,000 known ruins and 1,300 listed monuments while Modern Delhi, popularly known as Lutyens' Delhi has magnificent Malls, swan by over bridges, modern opulent high rise buildings and lots of greenery.
Delhi is divided into two parts: Old Delhi, in the north, the historic city; and New Delhi, in the south, since 1947 the capital of India, built in the first part of the 20th century as the capital of British India. It is situated on the western bank of the Jamuna River, a tributary of the Ganges (Ganga) River, about 100 miles (160 km) south of the Himalayas. The area of city is spread over an area of 1,484 sq. km. where more than 16 million people are inhabitants according to the census of 2011 while UN report is mentioned 25 millions according to 2014. That means, this pulsating metropolis has a bigger population than Australia.
On historical background, it has been home to many ancient empires such as the Mauryan Empire, Mughal Empire, and renowned dynasties like the Tomara dynasty, Slave dynasty, Tughluq dynasty, Khilji dynasty, and so on. The history of the city is as old as the epic Mahabharata. The town was known as Indraprastha, where Pandavas used to live. Delhi is also well known for Sufi devotion.
Delhi became India's political capital when the British shifted its capital from Calcutta in 1911. The name 'New Delhi' was given to the capital city in 1927 and on 13 February 1931 the city was inaugurated officially as capital of India. When India became independent on 15 August 1947, New Delhi was officially declared as the capital of the Union of India.