About Delhi
Delhi (Hindi: दिल्ली; Punjabi: ਦਿੱਲੀ; Urdu: دلی; IPA: [d̪ɪlːiː]; sometimes referred to as Dilli) is thesecond largest metropolis of India, with a population of 17 million [4], and a federally-administered union territory officially known as the National Capital Territory of Delhi (NCT). Located on the banks of the Yamuna River in northern India, it is one of the oldest continually inhabited cities in the world.
Delhi has been the capital of several Indian empires in medieval period and a major city along the old trade routes between northwest India and the Indo-Gangetic Plains. It is the site of many ancient and medieval monuments, archaeological sites and remains. The Mughal emperor Shahjahan built the city, now known as "Old Delhi", to serve as the capital of the Mughal Empire from 1649 to 1857.
After the British East India Company gained control of much of India during the 18th and 19th centuries, Calcutta became the capital both under Company rule and under the British Raj, until George V announced in 1911 that the capital was to move back to Delhi, and a new city, New Delhi, was to be built. When India gained independence from British rule in 1947, New Delhi was declared its capital and seat of government. As such, New Delhi houses important offices of the federal government, including the Parliament of India.
Owing to the immigration of people from across the country, Delhi has grown to be a cosmopolitan city. Its rapid development and urbanisation, coupled with the relatively high average income of its population, has transformed the city.[5] Today, Delhi is a major cultural, political, and commercial center of India.
source from:-http://en.wikipedia.org/