Mumtaz Mahal in the context of "Heir-apparent"

The Taj Mahal (/ˌtɑːdʒ məˈhɑːl, ˌtɑːʒ -/ TAHJ mə-HAHL, TAHZH -⁠; Hindustani: [taːdʒ ˈmɛɦ(ɛ)l]; lit. 'Crown of the Palace') is an ivory-white marble mausoleum on the right bank of the river Yamuna in Agra, Uttar Pradesh, India. It was commissioned in 1631 by the fifth Mughal emperor, Shah Jahan (r. 1628–1658), to house the tomb of his beloved wife, Mumtaz Mahal; it also houses the tomb of Shah Jahan himself. The tomb is the centrepiece of a 17-hectare (42-acre) complex, which includes a mosque and a guest house, and is set in formal gardens bounded on three sides by a crenellated wall.

Construction of the mausoleum was completed in 1648, but work continued on other phases of the project for another five years. The first ceremony held at the mausoleum was an observance by Shah Jahan, on 6 February 1643, of the 12th anniversary of the death of Mumtaz Mahal. The Taj Mahal complex is believed to have been completed in its entirety in 1653 at a cost estimated at the time to be around ₹32 million, which in 2015 would be approximately ₹52.8 billion (US$827 million).

Agra (/ˈæɡrə/; Hindi: Āgrā, pronounced [ˈaːɡɾaː] ) is a city on the banks of the Yamuna river in the Indian state of Uttar Pradesh, about 230 kilometres (140 mi) south-east of the national capital Delhi and 330 km west of the state capital Lucknow. It is also the part of Braj region. With a population of roughly 1.6 million, Agra is the fourth-most populous city in Uttar Pradesh and twenty-third most populous city in India.

Agra's notable historical period began during Sikandar Khan Lodi's reign, but the golden age of the city began with the Mughals in the early 16th century. Agra was the foremost city of the Indian subcontinent and the capital of the Mughal Empire under Mughal emperors Babur, Humayun, Akbar, Jahangir and Shah Jahan. Under Mughal rule, Agra became a centre for learning, arts, commerce, and religion, and saw the construction of the Agra Fort, Sikandra and Agra's most prized monument, the Taj Mahal, constructed between 1632 and 1648 by Shah Jahan in remembrance of his wife Mumtaz Mahal. With the decline of the Mughal empire in the late 18th century, the city fell successively first to Marathas and later to the East India Company. After Independence, Agra has developed into an industrial town, with a booming tourism industry, along with footwear, leather and other manufacturing. The Taj Mahal and the Agra Fort are UNESCO World Heritage Sites. The city features mild winters, hot and dry summers and a monsoon season, and is famous for its Mughlai cuisine. Agra is included on the Golden Triangle tourist circuit, along with Delhi and Jaipur; and the Uttar Pradesh Heritage Arc, a tourist circuit of Uttar Pradesh, along with Lucknow and Varanasi.

Shah Jahan I (Shahab-ud-Din Muhammad Khurram; 5 January 1592 – 22 January 1666), also called Shah Jahan the Magnificent, was the fifth Mughal Emperor from 1628 until his deposition in 1658. His reign marked the zenith of Mughal architectural and cultural achievements.

The third son of Jahangir (r. 1605–1627), Shah Jahan participated in the military campaigns against the Sisodia Rajputs of Mewar and the rebel Lodi nobles of the Deccan. After Jahangir's death in October 1627, Shah Jahan defeated his youngest brother Shahryar Mirza and crowned himself emperor in the Agra Fort. In addition to Shahryar, Shah Jahan executed most of his rival claimants to the throne. He commissioned many monuments, including the Red Fort, Shah Jahan Mosque and the famous Taj Mahal, where his favorite consort Mumtaz Mahal is entombed. In foreign affairs, Shah Jahan presided over the aggressive campaigns against the Deccan sultanates, the conflicts with the Portuguese, and the wars with the Safavids. He also suppressed several local rebellions and dealt with the devastating Deccan famine of 1630–32.