Delhi is a state/Union Territory of India.
Delhi along with few other neighbouring districts forms the 'National Capital Territory' of India. It contains the New Delhi which contains many of the administrative institutions of the national government, and is formally considered the national capital. It occupies an area of some 1,483 square kilometres (572 square miles) with a population of approximately 14 million. The principal spoken languages are Hindi, Urdu, Punjabi, and English.
Delhi is location between the Aravalli Hills to the southwest and the Yamuna river on whose western banks it stands. This enabled it to dominate the old trade routes from northwest India to the plains of the Ganges. Delhi is said to be the site of Indraprastha, capital of the Pandavas in the Indian epic Mahabharata. A village called Indarpat existed in Delhi until the beginning of the 19th century. Excavations have unearthed sherds of the grey painted ware (ca. 1000 BC) that some archaeologist associate with the age of the Mahabharata, but no coherent settlement traces have been found. Some locate Indraprastha in the Purana-Qila area.
The earliest architectural relics stem from the Mauryan Period (ca 300 BC), since then, the site has seen continuous settlement. In 1966, an inscription of the Mauryan King Ashoka, 273-236 BC was discovered near Srinivaspuri. The famous wrought iron pilar of Ashoka now to be seen in Qutb Minar was only manufactured in the Gupta-Period (AD 400-600) and transplanted to Delhi at some time in the 10th century. Two sandstone pillars inscribed with the edicts of Ashoka were only later brought to the city by Firuz Shah Tughluq.
In the Prithvirajaraso, the Rajput Anangpal is named as the founder of Delhi. He is supposed to have constructed the Lal-Kot and brought the Iron Pillar to the city. The Rajput period is dated from ca. 900-1200. The name of Dhilli or Dhillika first appears in an inscription from 1170 from Udaipur. By 1316, it may have become the capital of Haryana. After 1206, Delhi was the capital of the Delhi Sultanate (Mamluk dynasty, Khalij dynasty, Tughluq dynasty, Sayyid dynasty and Lodhi dynasty). The more recent city is believed to be made up of seven successive cities, the remains of some of which can still be seen on the ground.
1. Qila Rai Pithora built by Qutb-ud-din Aibak, near the oldest Rajput settlement in Lal-Kot
2. Siri, built by Alauddin Khilji in 1303
3. Tughluqabad, built by Ghiyazudin Tughluq (1321-1325).
4. Jahanpanah, built by Muhammad bin Tuqhluq (1325-1351)
5. Kotla Firoz Shah, built by Firuz Shah Tughluq (1351-1388)
6. Purana Qila built by Sher Shah Suri and Dinpanah built by Humayun, both in the same area near the speculated site of the legendary Indra-Prastha (1538-1545)
7. Shahjahanabad, built by Shah Jahan from 1638 to 1649, containing the Lal Qila and the Chandni Chowk.
In the mid-seventeenth century, the Mughal Emperor Shah Jahan (1628-1658) built the city that sometimes bears his name (Shahjahanabad), the seventh city of Delhi that is more commonly known as the old city or old Delhi. This city contains a number of significant architectural features; including most notably the Red Fort or Lal Qila. The old city served as the capital of the later Mughal empire from 1638 onwards, when Shah Jahan transferred the capital from Agra. Aurangzeb (1658-1707) crowned himself as emperor in Delhi in 1658 at the Shalinar garden ('Aizzabad-Bagh), a second coronation took place in 1659.
Delhi passed under British control in 1857 after the Sepoy mutiny and after Bahadur Shah Zafar II had been transported to Rangoon and became the Capital of British India in 1911 (formerly Calcutta). In the large scale rebuilding, parts of the Old City were pulled down to provide place for New Delhi.
The city is served by Indira Gandhi International Airport. Universities in Delhi include All India Institute of Medical Sciences, Delhi University, Guru Gobind Singh University (also known as Indraprastha University), Indian Institute of Technology, Delhi, Indira Gandhi National Open University, Institute of Chartered Accountants of India, Jamia Millia Islamia, Jawaharlal Nehru University, and The Indian Institute of Planning and Management.
Some of the popular tourist spots in Delhi are Bahai Temple, Birla Temple, Connaught Place, Deer Park, Gurdwara Bangla Sahib, Humayun's Tomb, India Gate, International Dolls Museum, Jama Masjid, Jantar Mantar, Kalindi Kunj, Lodhi Gardens, Mughal Gardens, National Museum, Nehru Planetarium, Old Fort or the Purana Qila, Qutab Minar, Rashtrapati Bhawan, Red Fort, or the Lal Qila, Safdarjang's Tomb, Sansad Bhawan or the Parliament House, Tughlaqabad Fort, and Chandni Chowk.