Delhi is the official Capital of India. Located on the banks of the River Yamuna, it has been continuously inhabited since at least the 6th century BC. After the rise of the Delhi Sultanate, Delhi emerged as a major political, cultural and commercial city along the trade routes between northwest India and the Indo-Gangetic plains. 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 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. Owing to the migration of people from across the country, Delhi has grown to be a cosmopolitan metropolis. Its rapid development and urbanization, coupled with the relatively high average income of its population, has transformed Delhi. Today Delhi is a major cultural, political, and commercial center of India.

The Taj Mahal of Delhi , India , is considered the finest example of Mughal architecture, a style that combines elements from Persian, Indian, and Islamic architectural styles. In 1983, the Taj Mahal became a UNESCO World Heritage Site and was cited as "the jewel of Muslim art in India and one of the universally admired masterpieces of the world's heritage." The white domed marble mausoleum is its most familiar component, the Taj Mahal is actually an integrated complex of structures. This Building was started in 1632 and was completed in 1653, and employed thousands of artisans and craftsmen.