Old Delhi is an area in the Central Delhi district of Delhi, India. It was founded as a walled city and officially named Shahjahanabad in 1648, when Shah Jahan decided to shift the Mughal capital from Agra. The construction of the city was completed in 1648, and it remained the capital of Mughal India until its fall in 1857, when the British Empire took over as paramount power in the Indian subcontinent.

Delhi, officially the National Capital Territory (NCT) of Delhi, is a city and a union territory of India containing New Delhi, the capital of India. Lying on both sides of the Yamuna river, but chiefly to the west, or beyond its right bank, Delhi shares borders with the state of Uttar Pradesh in the east and with the state of Haryana in the remaining directions. Delhi became a union territory on 1 November 1956 and the NCT in 1995. The NCT covers an area of 1,484 square kilometres (573 sq mi). According to the 2011 census, Delhi's city proper population was over 11 million, while the NCT's population was about 16.8 million.