DELHI, officially the National Capital Territory of DELHI (NCT), is a city and a union territory of India containing NEW DELHI, the capital of INDIA.
  According to the 2011 census, DELHI's city proper population was over 11 million, the second-highest in India after MUMBAI, while the whole NCT's population was about 16.8 million.
   DELHI is the second-wealthiest city in INDIA after MUMBAI and is home to 18 billionaires and 23,000 millionaires.
   DELHI has been continuously inhabited since the 6th century BCE. Through most of its history, DELHI has served as a capital of various kingdoms and empires, most notably the DELHI Sultanate and the Mughal Empire.

   The city has been captured, ransacked and rebuilt several times, particularly during the medieval period, and modern DELHI is a cluster of a number of cities spread across the metropolitan region (Wikipedia).