Prayagraj (, Hindi: [pɾəjaːɡ.ɾaːd͡ʑ]; ISO: Prayāgarāja), formerly and colloquially known as Allahabad (), is a metropolis in the Indian state of Uttar Pradesh. It is the administrative headquarters of the Prayagraj district, the most populous district in the state and 13th most populous district in India and the Prayagraj division. The city is the judicial capital of Uttar Pradesh with the Allahabad High Court being the highest judicial body in the state. As of 2011, Prayagraj is the seventh most populous city in the state, thirteenth in Northern India and thirty-sixth in India, with an estimated population of 1.53 million in the city. In 2011, it was ranked the world's 40th fastest-growing city. The city, in 2016, was also ranked the third most liveable urban agglomeration in the state (after Noida and Lucknow) and sixteenth in the country. Hindi is the most widely spoken language in the city.
Prayagraj lies close to Triveni Sangam, the "three-river confluence" of the Ganges, Yamuna, and the mythical Sarasvati. It plays a central role in Hindu scriptures. The city finds its earliest reference as one of the world's oldest known cities in Hindu texts and has been venerated as the holy city of Prayāga in the ancient Vedas. Prayagraj was also known as Kosambi in the late Vedic period, named by the Kuru rulers of Hastinapura, who developed it as their capital. Known as Purimtal in ancient Jain scriptures, it is also a sacred place for Jains, as it believed their first Tirthankara, Rishabhanatha, attained kevala jnana here. It maintained its prominence from the late Vedic period until the end of the Maurya Empire, with occupation continuing until the Gupta Empire. Since then, the city has been a political, cultural and administrative centre of the Doab region.
Akbarnama mentions that the Mughal emperor Akbar founded a great city in Allahabad. Abd al-Qadir Badayuni and Nizamuddin Ahmad mention that Akbar laid the foundations of an imperial city there which was called Ilahabas or Ilahabad. In the early 17th century, Allahabad was a provincial capital in the Mughal Empire under the reign of Jahangir. In 1833, it became the seat of the Ceded and Conquered Provinces region before its capital was moved to Agra in 1835. Allahabad became the capital of the North-Western Provinces in 1858 and was the capital of India for a day. The city was the capital of the United Provinces from 1902 to 1920 and remained at the forefront of national importance during the struggle for Indian independence.
Prayagraj is an international tourism destination, second in terms of tourist arrivals in the state after Varanasi. Located in southern Uttar Pradesh, the city covers 365 km2 (141 sq mi). Although the city and its surrounding area are governed by several municipalities, a large portion of Prayagraj district is governed by the Prayagraj Municipal Corporation. The city is home to colleges, research institutions and many central and state government offices, including High court of Uttar Pradesh. Prayagraj has hosted cultural and sporting events, including the Prayag Kumbh Mela and the Indira Marathon. Although the city's economy was built on tourism, most of its income now derives from real estate and financial services.
Prayagraj hosts the Kumbh Mela, one of the largest peaceful gatherings in the world, with the Government of Uttar Pradesh estimating participation. The event receives extensive national and international coverage and involved major infrastructure development projects in the city.
The location at the confluence of Ganges and Yamuna rivers has been known in ancient times as Prayāga, which means "place of a sacrifice" in Sanskrit (pra-, "fore-" + yāj-, "to sacrifice"). It was believed that god Brahma performed the very first sacrifice (yāga, yajna) in this place. The name Prayag alone continues to see use for the city to this day.
The word prayāga has been traditionally used to mean "a confluence of rivers". For Allahabad, it denoted the physical meeting point of the rivers Ganges and Yamuna in the city. An ancient tradition has it that a third river, invisible Sarasvati, also meets there with the two. Today, Triveni Sangam (or simply Sangam) is a more frequently used name for the confluence.
Prayagraj (Sanskrit: Prayāgarāja), meaning "the king among the five prayāgas", is used as a term of respect to indicate that this confluence is the most splendid one of the five sacred confluences in India.
The Mughal emperor Akbar visited the region in 1575 and was so impressed by the strategic location of the site that he ordered a fort be constructed. The fort was constructed by 1584 and called Ilahabas or "Abode of God", later changed to Allahabad under Shah Jahan. Speculations regarding its name, however, exist. Because of the surrounding people calling it Alhabas, has led to some people holding the view that it was named after Alha from Alha's story. James Forbes' account of the early 1800s claims that it was renamed Allahabad or "Abode of God" by Jahangir after he failed to destroy the Akshayavat tree. The name, however, predates him, with Ilahabas and Ilahabad mentioned on coins minted in the city since Akbar's rule, the latter name became predominant after the emperor's death. It has also been thought to not have been named after Allah but ilaha (the gods). Shaligram Shrivastav claimed in Prayag Pradip that the name was deliberately given by Akbar to be construed as both Hindu ("ilaha") and Muslim ("Allah"). Forms such as Illahabad still see use.
Over the years, a number of attempts were made by the BJP-led governments of Uttar Pradesh to rename Allahabad to Prayagraj. In 1992, the planned rename was shelved when the chief minister, Kalyan Singh, was forced to resign following the Babri Masjid demolition. The government of Rajnath Singh also unsuccessfully attempted to change the name in 2001. The rename finally succeeded in October 2018 when the Yogi Adityanath-led government officially changed the name of the city to Prayagraj.
The earliest mention of Prayāga and the associated pilgrimage is found in Rigveda Pariśiṣṭa (supplement to the Rigveda, c. 1200–1000 BCE). It is also mentioned in the Pali canons of Buddhism, such as in section 1.7 of Majjhima Nikaya (c. 500 BCE), wherein the Buddha states that bathing in Payaga (Skt: Prayaga) cannot wash away cruel and evil deeds, rather the virtuous one should be pure in heart and fair in action. The Mahabharata (c. 400 BCE–300 CE) mentions a bathing pilgrimage at Prayag as a means of prāyaścitta (atonement, penance) for past mistakes and guilt. In Tirthayatra Parva, before the great war, the epic states "the one who observes firm [ethical] vows, having bathed at Prayaga during Magha, O best of the Bharatas, becomes spotless and reaches heaven." In Anushasana parva, after the war, the epic elaborates this bathing pilgrimage as "geographical tirtha" that must be combined with manasa-tirtha (tirtha of the heart) whereby one lives by values such as truth, charity, self-control, patience and others.
Prayāga is mentioned in the Agni Purana and other Puranas with various legends, including being one of the places where Brahma attended a yajna (homa), and the confluence of river Ganges, Yamuna and mythical Saraswati site as the king of pilgrimage sites (Tirtha Raj). Other early accounts of the significance of Prayag to Hinduism is found in the various versions of the Prayaga Mahatmya, dated to the late 1st-millennium CE. These Purana-genre Sanskrit texts describe Prayag as a place "bustling with pilgrims, priests, vendors, beggars, guides" and local citizens busy along the confluence of the rivers (sangam). Prayaga is also mentioned in the Hindu epic Ramayana, a place with the legendary Ashram of sage Bharadwaj.
Purimtal Jain Tirth, located in Prayagraj (formerly known as Purimtal), is a site of religious and historical significance for Jains. This ancient pilgrim site is revered as the spot where Rishabhanatha, the first Tirthankara, achieved kevala jnana as per Jain beliefs. As documented in Vividha Tirtha Kalpa by Acharya Jinaprabhasuri, Purimtal once featured numerous Jain temples. Rishabhanatha is said to have attained omniscience under the Akshayavata tree. This tree, often referred to as the "indestructible" tree in legends, is a point of spiritual reverence in other religions as well. The site also holds importance in Hindu and Buddhist traditions. Originally, sandalwood footprints of Rishabhanatha were placed beneath the tree, which were later replaced with stone replicas following theft.