Delhi has the political status of a federally-administered union territory known as the National Capital Territory of Delhi. Delhi is one of the oldest continually inhabited cities in the world. Having been the capital of several empires in ancient India, Delhi was a major city in the old trade routes from northwest India to the Gangetic Plains. Many ancient monuments, archaeological sites and remains of national importance have been erected in its history. The Mughals built a section of the city (now known as Old City or Old Delhi) that served as the capital of Mughal Empire for a long period. During the British Raj, New Delhi was built as an administrative quarter of the city. New Delhi was declared the capital of India after India gained independence from British rule in 1947. As the seat of the Government of India, New Delhi houses important offices of the federal government, including the Parliament of India. Delhi has grown up to be a cosmopolitan city owing to the immigration of people from across the country. Like many other large cities of the world, Delhi suffers from urbanisation problems such as pollution, traffic congestion and scarcity of resources. The rapid development and urbanisation of New Delhi and surrounding areas coupled with the high average income of the populace has largely eclipsed socio-cultural traits that used to represent Delhi until a few years after independence.

Economy
With an estimated net State Domestic Product (SDP) of 83,085 crores (830.85 billion) Indian rupee (INR) (for the year 2004–05), Delhi is an important commercial center in South Asia. Delhi has a per capita income of 53,976 INR which is around 2.5 times of the national average. The tertiary sector contributes 70.95% of Delhi's gross SDP followed by secondary and primary sectors with 25.2% and 3.85% contribution respectively. Delhi's workforce constitutes 32.82% of the population showing an increase of 52.52% between 1991 and 2001. Delhi's unemployment rate decreased from 12.57% in 1999–2000 to 4.63% in 2003. In December 2004, 636,000 people were registered with various employment exchange programmes in Delhi.

Geography
Delhi has four major satellite cities which lie outside the National Capital Territory of Delhi. These are Gurgaon and Faridabad (in Haryana), and NOIDA and Ghaziabad (in Uttar Pradesh). Delhi is divided into nine districts. Each district (division) is headed by a Deputy Commissioner and has three subdivisions. A Subdivision Magistrate heads each subdivision. All Deputy Commissioners report to the Divisional Commissioner. The District Administration of Delhi is the enforcing department for all kinds of State and Central Government policies and exercises supervisory powers over numerous other functionaries of the Government.