Hyderabad

Hyderabad  is the capital of the state Andhra Pradesh, India. It also goes by its sobriquet City of Pearls. As of 2010 it is the sixth most populous city and sixth-most populous urban agglomeration in India. Hyderabad was founded by Muhammad Quli Qutb Shah in 1591 on the banks of Musi. Today the city covers an area of approximately 650 km². The twin cities of Hyderabad and Secunderabad come under the ambit of a single municipal unit, The Greater Hyderabad Municipal Corporation.
Hyderabad has developed into one of the major hubs for the information technology industry in India which has earned it the additional sobriquet "Cyberabad". In addition to the IT industry, various biotechnology and pharmaceutics companies have set up their operations in Hyderabad owing to its established Public sector in Life Science Research and Genome Valley. The city houses the most expensive residential real estate in Andhra Pradesh in Banjara Hills and Jubilee Hills. The city is home to the Telugu Film Industry, either the second- or third-largest in India, depending on the basis of measurement, known popularly as Tollywood.Residents of Hyderabad are generally called Hyderabadis. Located at the crossroads of North and South India, Hyderabad has developed a unique culture that is reflected in its language and architecture.
Although Hyderabad was founded less than 500 years ago, archaeologists have unearthed Iron Age sites near the city that could date back to 500 BC. Approximately over 1000 years ago this region was ruled by Kakatiyas. Muhammad Quli Qutb Shah, a ruler of the Qutb Shahi dynasty (the ruling family of the Golconda Sultanate, previously a feudatory of Bahmani sultanate that declared independence in 1512) founded the city of Hyderabad on the banks of the Musi River in 1591 to relieve a water shortage the dynasty had experienced at its old headquarters at Golconda city (11 kilometers west of Hyderabad city on the other side of Musi). He also ordered the construction of the Charminar.

Delhi

Delhi, locally pronounced as Dilli (Hindi: दिल्ली, Punjabi: ਦਿੱਲੀ, Urdu: دِلّی) or Dehli (Hindi: देहली, Punjabi: ਦੇਹਲੀ, Urdu: دهلی), officially National Capital Territory of Delhi (NCT), is the largest metropolis by area and the second-largest metropolis by population in India. It is the eighth largest metropolis in the world by population with more than 12.25 million inhabitants in the territory. There are nearly 22.2 million residents in the greater National Capital Region urban area (which also includes Noida, Greater Noida, Ghaziabad, Gurgaon and Faridabad along with other smaller nearby towns). The name Delhi is often also used to include urban areas near the NCT, as well as to refer to New Delhi, the capital of India, which lies within the metropolis. Although technically a federally administered union territory, the political administration of the NCT of Delhi today more closely resembles that of a state of India with its own legislature, high court and an executive council of ministers headed by a Chief Minister. New Delhi, jointly administered by both the federal Government of India and the local Government of Delhi, is also the capital of the NCT of Delhi.
Located on the banks of the River Yamuna, Delhi has been known to be continuously inhabited since at least the 6th century BC, though human habitation is believed to have existed since the second millennium BC.Delhi is also widely believed to have been the site of Indraprastha, the legendary capital of the Pandavas during the times of the Mahabharata. Delhi re-emerged as a major political, cultural and commercial city along the trade routes between northwest India and the Gangetic plain after the rise of the Delhi sultanates. It is the site of many ancient and medieval monuments, archaeological sites and remains. In 1639, Mughal emperor Shahjahan built a new walled city in Delhi which served as the capital of the Mughal Empire from 1649 to 1857.
After the British East India Company had 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 it was to move back to Delhi. A new capital city, New Delhi, was built to the south of the old city during the 1920s. 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, as well as numerous national museums, monuments, and art galleries.
Owing to the migration of people from across the country, Delhi has grown to be a multicultural, cosmopolitan metropolis. Its rapid development and urbanisation, coupled with the relatively high average income of its population, has transformed Delhi into a major cultural, political, and commercial centre of India.

Kolkata

Kolkata (Bengali: কলকাতা [ˈkolkat̪a]), formerly known as Calcutta, is the capital of the Indian state of West Bengal and a Gamma World City. Kolkata is the commercial capital of East India, located on the east bank of the Hooghly River. The Kolkata metropolitan area, including suburbs, has a population exceeding 15 million, making it the third most populous metropolitan area in India and the 13th most populous urban area in the world. The city is also classified as the eighth largest urban agglomeration in the world.
Kolkata served as the capital of India during the British Raj until 1911 when due to geographical disadvantages and growing nationalism in Bengal the capital was shifted to New Delhi. The city is noted for its revolutionary history, ranging from the Indian struggle for independence movements. Once the center of modern education, science, culture and politics in India, Kolkata witnessed economic stagnation in the years following India's independence in 1947. However, since the year 2000, an economic rejuvenation has led to an acceleration in the city's growth. Like other metropolitan cities of India, Kolkata continues to struggle with urbanisation problems like poverty, pollution and traffic congestion. Kolkata city, under the jurisdiction of the Kolkata Municipal Corporation (KMC), has an area of 185 km² (71 sq mi). The Kolkata conurbation (Kolkata Metropolitan Area), however, is spread over 1,750 km² (676 sq mi), and comprises 157 postal areas, as of 2006.^[48] The metropolitan area is formally administered by several local governments including 38 local municipalities. The urban agglomeration comprises 72 cities and 527 towns and villages. The suburban areas of Kolkata metropolitan district incorporates parts of the districts North 24 Parganas, South 24 Parganas, Howrah, Hooghly and Nadia.