Sawai Jai Singh II (3 November 1688 – 21 September 1743), was the 30th
Kachwaha Rajput
Rājpūt (, from Sanskrit ''rājaputra'' meaning "son of a king"), also called Thākur (), is a large multi-component cluster of castes, kin bodies, and local groups, sharing social status and ideology of genealogical descent originating fro ...
ruler of the
Kingdom of Amber
The Kingdom of Amber, later the Kingdom of Jaipur or the Jaipur State, was located in the north-eastern historic Dhundhar region of Rajputana and was ruled by the Kachhwaha, Kachwaha Rajput dynasty. The kingdom was established by Dulha Rai, po ...
, who later founded the fortified city of
Jaipur
Jaipur (; , ) is the List of state and union territory capitals in India, capital and the List of cities and towns in Rajasthan, largest city of the north-western States and union territories of India, Indian state of Rajasthan. , the city had ...
and made it his capital. He became the ruler of Amber at the age of 11, after the untimely death of his father Mirza
Raja
Raja (; from , IAST ') is a noble or royal Sanskrit title historically used by some Indian subcontinent, Indian rulers and monarchs and highest-ranking nobles. The title was historically used in the Indian subcontinent and Southeast Asia.
T ...
Bishan Singh on 31 December 1699.
Initially, Raja Jai Singh served as a
vassal
A vassal or liege subject is a person regarded as having a mutual obligation to a lord or monarch, in the context of the feudal system in medieval Europe. While the subordinate party is called a vassal, the dominant party is called a suzerain ...
of the
Mughal Empire
The Mughal Empire was an Early modern period, early modern empire in South Asia. At its peak, the empire stretched from the outer fringes of the Indus River Basin in the west, northern Afghanistan in the northwest, and Kashmir in the north, to ...
. He was given the title of "''Sawai"'' by
Mughal Emperor
The word ''emperor'' (from , via ) can mean the male ruler of an empire. ''Empress'', the female equivalent, may indicate an emperor's wife (empress consort), mother/grandmother (empress dowager/grand empress dowager), or a woman who rules ...
Aurangzeb
Alamgir I (Muhi al-Din Muhammad; 3 November 1618 – 3 March 1707), commonly known by the title Aurangzeb, also called Aurangzeb the Conqueror, was the sixth Mughal emperors, Mughal emperor, reigning from 1658 until his death in 1707, becomi ...
before the siege of
Khelna Fort
A fortification (also called a fort, fortress, fastness, or stronghold) is a military construction designed for the defense of territories in warfare, and is used to establish rule in a region during peacetime. The term is derived from La ...
in
Deccan."Sawai" means one and a quarter times superior to his contemporaries. He received the title of "''Maharaja Sawai'', ''Raj Rajeshwar'', ''Shri Rajadhiraj'' " in the year 1723 which happened to be the reign of later
Mughals
The Mughal Empire was an early modern empire in South Asia. At its peak, the empire stretched from the outer fringes of the Indus River Basin in the west, northern Afghanistan in the northwest, and Kashmir in the north, to the highlands of pre ...
under emperor
Muhammad Shah; this was in addition to the title of "''Saramad-i-Raja-i-Hindustan"'', conferred on him on 21 April 1721.
[Sarkar, Jadunath (1994) A History of Jaipur, New Delhi: Orient Blackswan, , pp. 171, 173]
In the later part of his life Sawai Jai Singh broke free from Mughal
hegemony
Hegemony (, , ) is the political, economic, and military predominance of one State (polity), state over other states, either regional or global.
In Ancient Greece (ca. 8th BC – AD 6th c.), hegemony denoted the politico-military dominance of ...
, and to assert his sovereignty, performed the
Ashvamedha
The Ashvamedha () was a horse sacrifice ritual followed by the Śrauta tradition of Vedic religion. It was used by ancient Indian kings to prove their imperial sovereignty: a horse accompanied by the king's warriors would be released to wander ...
sacrifice, an ancient rite that had been abandoned for several centuries. He moved his kingdom's capital from the town of Amber to the newly established walled city of Jaipur in 1727 and performed two Ashwamedha sacrifices, one in 1734, and again in 1741.
Sawai Jai Singh II other than administration and state craftship had a profound interest in the fields of
Mathematics
Mathematics is a field of study that discovers and organizes methods, Mathematical theory, theories and theorems that are developed and Mathematical proof, proved for the needs of empirical sciences and mathematics itself. There are many ar ...
,
Architecture
Architecture is the art and technique of designing and building, as distinguished from the skills associated with construction. It is both the process and the product of sketching, conceiving, planning, designing, and construction, constructi ...
,
Astronomy
Astronomy is a natural science that studies celestial objects and the phenomena that occur in the cosmos. It uses mathematics, physics, and chemistry in order to explain their origin and their overall evolution. Objects of interest includ ...
,
Astrology
Astrology is a range of Divination, divinatory practices, recognized as pseudoscientific since the 18th century, that propose that information about human affairs and terrestrial events may be discerned by studying the apparent positions ...
and
Literature
Literature is any collection of Writing, written work, but it is also used more narrowly for writings specifically considered to be an art form, especially novels, Play (theatre), plays, and poetry, poems. It includes both print and Electroni ...
. He commissioned the
Jantar Mantar observatories at multiple places in India, including his capital Jaipur. He had
Euclid
Euclid (; ; BC) was an ancient Greek mathematician active as a geometer and logician. Considered the "father of geometry", he is chiefly known for the '' Elements'' treatise, which established the foundations of geometry that largely domina ...
's "Elements of Geometry" translated into
Sanskrit
Sanskrit (; stem form ; nominal singular , ,) is a classical language belonging to the Indo-Aryan languages, Indo-Aryan branch of the Indo-European languages. It arose in northwest South Asia after its predecessor languages had Trans-cultural ...
.
The situation on his accession
When Jai Singh acceded to the ancestral throne at Amber, he had barely enough resources to pay for the support of 1000 cavalry. This abysmal situation had arisen during the previous 96 years, coinciding with the reign of the
Mughal Emperor
Aurangzeb
Alamgir I (Muhi al-Din Muhammad; 3 November 1618 – 3 March 1707), commonly known by the title Aurangzeb, also called Aurangzeb the Conqueror, was the sixth Mughal emperors, Mughal emperor, reigning from 1658 until his death in 1707, becomi ...
. The Jaipur kings had always preferred diplomacy over arms in their dealings with the Mughals, since their kingdom was located so close to the Mughal power centers of
Delhi
Delhi, officially the National Capital Territory (NCT) of Delhi, is a city and a union territory of India containing New Delhi, the capital of India. Straddling the Yamuna river, but spread chiefly to the west, or beyond its Bank (geography ...
and
Agra
Agra ( ) is a city on the banks of the Yamuna river in the Indian state of Uttar Pradesh, about south-east of the national capital Delhi and 330 km west of the state capital Lucknow. With a population of roughly 1.6 million, Agra is the ...
.
Six months after his accession, Jai Singh was ordered by Aurangzeb to serve in the Deccan Wars. However, there was a delay of about one year in his responding to the call. One reason for this was that he was ordered to recruit a large force, in excess of the contingent required by his ''mansab''. He also had to conclude his marriage with the daughter of Udit Singh, the nephew of Raja Uttam Ram Gaur of Sheopur, in March 1701. Jai Singh reached
Burhanpur on 3 August 1701, but he could not proceed further due to heavy rains. On 13 September 1701, an additional cut in his rank (by 500) and pay was made. His feat of arms at the siege of
Khelna (1702) was rewarded with the mere restoration of his earlier rank and the title of Sawai (meaning one and a quarter, i.e., more capable than one man). When Aurangzeb's grandson
Bidar Bakht deputed Sawai Jai Singh to govern the province of
Malwa
Malwa () is a historical region, historical list of regions in India, region of west-central India occupying a plateau of volcanic origin. Geologically, the Malwa Plateau generally refers to the volcanic plateau, volcanic upland north of the ...
(1704), Aurangzeb angrily revoked this appointment as ''jaiz nist'' (invalid).
Dealings with the later Mughals
The death of Aurangzeb (1707) at first only increased Jai Singh's troubles. His patrons Bidar Bakht and his father Azam were on the losing side in the
Mughal war of succession. Sawai Jai Singh formed an alliance with the Rajput states of
Mewar
Mewar, also spelled as Mewad is a region in the south-central part of Rajasthan state of India. It includes the present-day districts of Bhilwara, Chittorgarh, Pratapgarh, Rajsamand, Udaipur, Pirawa Tehsil of Jhalawar District of Rajasth ...
(
matrimonially) and
Marwar
Marwar (also called Jodhpur region) is a region of western Rajasthan state in North Western India. It lies partly in the Thar Desert. 'Maru' is a Sanskrit word for desert. The word 'wad' literally means fence in Rajasthani languages. Engl ...
against
Mughal Emperor
The emperors of the Mughal Empire, who were all members of the Timurid dynasty (House of Babur), ruled the empire from its inception on 21 April 1526 to its dissolution on 21 September 1857. They were supreme monarchs of the Mughal Empire in ...
Bahadur Shah I.
Jai Singh and the Marathas
The
Kachwaha ruler was appointed to govern
Malwa
Malwa () is a historical region, historical list of regions in India, region of west-central India occupying a plateau of volcanic origin. Geologically, the Malwa Plateau generally refers to the volcanic plateau, volcanic upland north of the ...
three times between 1714 and 1737. In Jai Singh's first
viceroyalty
A viceroyalty was an entity headed by a viceroy. It dates back to the Spanish colonization of the Americas in the sixteenth century.
British Empire India
* British Raj, India was governed by the Governor-General of India, Governor-General and Vi ...
(subahdar) of Malwa (1714–1717), isolated Maratha war-bands that entered the province from the south (Deccan) were constantly defeated and repulsed by Jai Singh. In 1728, Peshwa
Baji Rao defeated the
Nizam of
Hyderabad
Hyderabad is the capital and largest city of the Indian state of Telangana. It occupies on the Deccan Plateau along the banks of the Musi River (India), Musi River, in the northern part of Southern India. With an average altitude of , much ...
, part of the Mughal Deccan (
Treaty of Shevgaon, March 1728). With an agreement from Baji Rao to spare the Nizam's own domains, the Nizam allowed the Marathas a free passage through
Berar and
Khandesh, the gateway into
Hindustan
''Hindūstān'' ( English: /ˈhɪndustæn/ or /ˈhɪndustɑn/, ; ) was a historical region, polity, and a name for India, historically used simultaneously for northern Indian subcontinent and the entire subcontinent, used in the modern day ...
. The Marathas were then able to plant a permanent camp beyond the southern frontier of
Malwa
Malwa () is a historical region, historical list of regions in India, region of west-central India occupying a plateau of volcanic origin. Geologically, the Malwa Plateau generally refers to the volcanic plateau, volcanic upland north of the ...
. Following the victory of the
Peshwa
The Peshwa was the second highest office in the Maratha Empire, next in rank and prestige only to that of the Chhatrapati. Initially serving as the appointed prime minister in the Maratha Kingdom, the office became hereditary when Shahu gave t ...
's brother,
Chimaji Appa, over the governor of Malwa
Girdhar Bahadur on 29 November 1728, coupled with the subsequent rebellion in Bundelkhand led by
Chhatra Sal with Maratha support, the Marathas were able to convulse much of the country beyond the Northern and Southern borders of the
Narmada.
Upon Jai Singh's second appointment to Malwa (1729–1730), as a far-sighted statesmen, Jai Singh was able to perceive a complete change in the political situation, during the twelve years which had passed since his first viceroyalty there. Imperial power had by then been crippled by the
rebellion
Rebellion is an uprising that resists and is organized against one's government. A rebel is a person who engages in a rebellion. A rebel group is a consciously coordinated group that seeks to gain political control over an entire state or a ...
of the Nizam of Hyderabad as well as the ability of Peshwa Baji Rao to stabilize the internal situation of the Marathas, which resulted in their occupation of
Gujarat
Gujarat () is a States of India, state along the Western India, western coast of India. Its coastline of about is the longest in the country, most of which lies on the Kathiawar peninsula. Gujarat is the List of states and union territories ...
and an immense increase of their forces.
Nonetheless, in the name of the friendship between their royal ancestors, Jai Singh II, was able to appeal to
Shahu to restore to the imperialist, the great
fortress
A fortification (also called a fort, fortress, fastness, or stronghold) is a military construction designed for the defense of territories in warfare, and is used to establish rule in a region during peacetime. The term is derived from L ...
of
Mandu which the Marathas had occupied a few weeks earlier (order date 19 March 1730). By May, Jai Singh was recalled back to
Rajputana
Rājputana (), meaning Land of the Rajputs, was a region in the Indian subcontinent that included mainly the entire present-day States of India, Indian state of Rajasthan, parts of the neighboring states of Madhya Pradesh and Gujarat, and adjo ...
to attend more pressing matters, which thus resulted in his two years disassociation from Malwa.
In 1732, Jai Singh was for the last time, appointed Subahdar of Malwa (1732–1737), during which time he petitioned
Muhammad Shah to compromise with the Marathas under
Shahu, who remembered the positive relationship between the late
Jai Singh I and his own grandfather,
Shivaji
Shivaji I (Shivaji Shahaji Bhonsale, ; 19 February 1630 – 3 April 1680) was an Indian ruler and a member of the Bhonsle dynasty. Shivaji carved out his own independent kingdom from the Sultanate of Bijapur that formed the genesis of the ...
.
For this sensible advice, coupled with anti–Jai Singh rhetoric at the Mughal court at Delhi, as well as Muhammad Shah's inability to assert his own
will
Will may refer to:
Common meanings
* Will and testament, instructions for the disposition of one's property after death
* Will (philosophy), or willpower
* Will (sociology)
* Will, volition (psychology)
* Will, a modal verb - see Shall and will
...
, Jai Singh was removed from his post while the Mughals decided on war. In this regard, Jai Singh II was practically the last subahdar of Malwa, as
Nizam-ul-Mulk Asaf Jah, who replaced him in 1737, met with most discomfiting failure at the hands of the Peshwa, resulting with the ceding of the whole of Malwa to the Marathas (
Treaty of Duraha, Saturday 7 January 1738).
Exploiting the weakening of the Mughal state, the
Persian raider
Nadir Shah defeated the Mughals at
Karnal
Karnal () is a city located in the state of Haryana, India and is the administrative headquarters of Karnal District. The city is well connected as it lies on National Highway 01, in the south of the city lies the cities of Panipat and Sonipa ...
(13 February 1739) and finally sacked
Delhi
Delhi, officially the National Capital Territory (NCT) of Delhi, is a city and a union territory of India containing New Delhi, the capital of India. Straddling the Yamuna river, but spread chiefly to the west, or beyond its Bank (geography ...
(11 March, same year). Through this period of turmoil, Jai Singh remained in his own state—but he was not idle. Foreseeing the troubled time ahead, Jai Singh II initiated a program of extensive
fortification
A fortification (also called a fort, fortress, fastness, or stronghold) is a military construction designed for the defense of territories in warfare, and is used to establish rule in a region during peacetime. The term is derived from Lati ...
within the
thikanas under Jaipur. To this day, most of the later fortifications around the former Jaipur state, are attributed to the reign of Jai Singh II.
Jai Singh's armed forces
Jai Singh increased the size of his ancestral kingdom by annexing lands from the Mughals and rebel chieftains—sometimes by paying money and sometimes through war. The most substantial acquisition was of
Shekhawati, which also gave Jai Singh the most able recruits for his fast-expanding army.
According to an estimate by
Jadunath Sarkar, ''Jai Singh's regular army did not exceed 40,000 men, which would have cost about 60 lakhs a year, but his strength lay in the large number of
artillery
Artillery consists of ranged weapons that launch Ammunition, munitions far beyond the range and power of infantry firearms. Early artillery development focused on the ability to breach defensive walls and fortifications during sieges, and l ...
and copious supply of munitions which he was careful to maintain and his rule of arming his foot with
matchlock
A matchlock or firelock is a historical type of firearm wherein the gunpowder is ignited by a burning piece of flammable cord or twine that is in contact with the gunpowder through a mechanism that the musketeer activates by pulling a lever or Tri ...
s instead of the
traditional Rajput
Rājpūt (, from Sanskrit ''rājaputra'' meaning "son of a king"), also called Thākur (), is a large multi-component cluster of castes, kin bodies, and local groups, sharing social status and ideology of genealogical descent originating fro ...
sword
A sword is an edged and bladed weapons, edged, bladed weapon intended for manual cutting or thrusting. Its blade, longer than a knife or dagger, is attached to a hilt and can be straight or curved. A thrusting sword tends to have a straighter ...
and
shield
A shield is a piece of personal armour held in the hand, which may or may not be strapped to the wrist or forearm. Shields are used to intercept specific attacks, whether from close-ranged weaponry like spears or long ranged projectiles suc ...
'' - ''He had the wisdom to recognize early the change which firearms had introduced in Indian warfare and to prepare for himself for the new war by raising the fire-power of his army to the maximum'', he thus anticipated the success of later Indian rulers like
Mirza Najaf Khan,
Mahadji Sindhia and
Tipu Sultan
Tipu Sultan (, , ''Sultan Fateh Ali Sahab Tipu''; 1 December 1751 – 4 May 1799) commonly referred to as Sher-e-Mysore or "Tiger of Mysore", was a ruler of the Kingdom of Mysore based in South India. He was a pioneer of rocket artillery ...
. Jai Singh's experimental weapon,
the Jaivana, which he created prior to the shift of his capital to Jaipur, remains the largest wheeled
cannon
A cannon is a large-caliber gun classified as a type of artillery, which usually launches a projectile using explosive chemical propellant. Gunpowder ("black powder") was the primary propellant before the invention of smokeless powder during th ...
in the world. In 1732, Jai Singh, as governor of
Malwa
Malwa () is a historical region, historical list of regions in India, region of west-central India occupying a plateau of volcanic origin. Geologically, the Malwa Plateau generally refers to the volcanic plateau, volcanic upland north of the ...
, maintained a force of 30,000
soldiers, split evenly into horsemen and foot-
musketeers. This figure does not include his contingents in the Subahs of
Agra
Agra ( ) is a city on the banks of the Yamuna river in the Indian state of Uttar Pradesh, about south-east of the national capital Delhi and 330 km west of the state capital Lucknow. With a population of roughly 1.6 million, Agra is the ...
and
Ajmer
Ajmer () is a city in the north-western States and union territories of India, Indian state of Rajasthan. It serves as the administrative headquarters of the Ajmer district and Ajmer division. It lies at the centre of Rajasthan, earning it the ...
or in his own dominions and
fort
A fortification (also called a fort, fortress, fastness, or stronghold) is a military construction designed for the defense of territories in warfare, and is used to establish rule in a region during peacetime. The term is derived from La ...
garrisons.
Jai Singh's ambitions in Rajputana

The armed strength of Jai Singh had made him the most formidable ruler in
Northern India
North India is a geographical region, loosely defined as a cultural region comprising the northern part of India (or historically, the Indian subcontinent) wherein Indo-Aryans (speaking Indo-Aryan languages) form the prominent majority populati ...
, and all the other
Raja
Raja (; from , IAST ') is a noble or royal Sanskrit title historically used by some Indian subcontinent, Indian rulers and monarchs and highest-ranking nobles. The title was historically used in the Indian subcontinent and Southeast Asia.
T ...
s looked up to him for protection and the promotion of their interests at the
Imperial court. As the fast-spreading
Maratha
The Marathi people (; Marathi: , ''Marāṭhī lōk'') or Marathis (Marathi: मराठी, ''Marāṭhī'') are an Indo-Aryan ethnolinguistic group who are native to Maharashtra in western India. They natively speak Marathi, an Indo-A ...
dominion and their raids into the north had caused alarm among the Rajput chiefs, Jai Singh called a conference of Rajput rulers at Hurda (1734) to deal with this peril, but nothing came of it. In 1736, Peshwa Baji Rao imposed tribute on the Kingdom of
Mewar
Mewar, also spelled as Mewad is a region in the south-central part of Rajasthan state of India. It includes the present-day districts of Bhilwara, Chittorgarh, Pratapgarh, Rajsamand, Udaipur, Pirawa Tehsil of Jhalawar District of Rajasth ...
. To thwart further Maratha expansion, Sawai Jai Singh planned the formation of a local hegemony, led by Jaipur, and a political union in Rajputana. To this end, he annexed
Bundi and
Rampura in the Malwa plateau, made a matrimonial alliance with Mewar, and intervened in the affairs of the
Rathors of
Bikaner
Bikaner () is a city in the northwest of the States and territories of India, state of Rajasthan, India. It is located northwest of the state capital, Jaipur. It is the administrative headquarters of Bikaner District and Bikaner division.
Fo ...
and
Jodhpur
Jodhpur () is the second-largest city of the north-western Indian state of Rajasthan, after its capital Jaipur. As of 2023, the city has a population of 1.83 million. It serves as the administrative headquarters of the Jodhpur district and ...
. These half-successful attempts only stiffened the backs of the other Rajput clans, who turned to the Marathas for aid, consequently hastening that state's domination over Rajasthan. Jai Singh's ambitions in Rajputana failed after the
Battle of Gangwana.
Death and succession
The
Battle of Gangwana was Jai Singh's last significant battle. Never recovering from the shock, he died two years later, in 1743.
Madho Singh later avenged his father by poisoning
Bakht Singh of Marwar. Jai Singh was cremated at the Royal Crematorium at Gaitore in the north of Jaipur. He was succeeded by his son
Ishwari Singh.
Contributions to society, culture, and science
Jai Singh was the first Hindu ruler in centuries to perform ancient
Vedic
upright=1.2, The Vedas are ancient Sanskrit texts of Hinduism. Above: A page from the '' Atharvaveda''.
The Vedas ( or ; ), sometimes collectively called the Veda, are a large body of religious texts originating in ancient India. Composed ...
ceremonies like the
Ashwamedha sacrifices (1716) and the
Vajapeya (1734); on both occasions, vast amounts were distributed in
charity
Charity may refer to:
Common meanings
* Charitable organization or charity, a non-profit organization whose primary objectives are philanthropy and social well-being of persons
* Charity (practice), the practice of being benevolent, giving and sha ...
. Being initiated in the
Nimbarka Sampradaya of the
Vaishnava
Vaishnavism () ), also called Vishnuism, is one of the major Hindu traditions, that considers Vishnu as the sole supreme being leading all other Hindu deities, that is, '' Mahavishnu''. It is one of the major Hindu denominations along wit ...
sect, he also promoted
Sanskrit
Sanskrit (; stem form ; nominal singular , ,) is a classical language belonging to the Indo-Aryan languages, Indo-Aryan branch of the Indo-European languages. It arose in northwest South Asia after its predecessor languages had Trans-cultural ...
learning and initiated reforms in
Hindu
Hindus (; ; also known as Sanātanīs) are people who religiously adhere to Hinduism, also known by its endonym Sanātana Dharma. Jeffery D. Long (2007), A Vision for Hinduism, IB Tauris, , pp. 35–37 Historically, the term has also be ...
society
A society () is a group of individuals involved in persistent social interaction or a large social group sharing the same spatial or social territory, typically subject to the same political authority and dominant cultural expectations. ...
, including the abolition of Sati and the reduction of wasteful expenditures associated with
Rajput
Rājpūt (, from Sanskrit ''rājaputra'' meaning "son of a king"), also called Thākur (), is a large multi-component cluster of castes, kin bodies, and local groups, sharing social status and ideology of genealogical descent originating fro ...
wedding
A wedding is a ceremony in which two people are united in marriage. Wedding traditions and customs vary greatly between cultures, ethnicity, ethnicities, Race (human categorization), races, religions, Religious denomination, denominations, Cou ...
s. It was at Jai Singh's insistence that the hated
jaziya tax
A tax is a mandatory financial charge or levy imposed on an individual or legal entity by a governmental organization to support government spending and public expenditures collectively or to regulate and reduce negative externalities. Tax co ...
, imposed on the
Hindu
Hindus (; ; also known as Sanātanīs) are people who religiously adhere to Hinduism, also known by its endonym Sanātana Dharma. Jeffery D. Long (2007), A Vision for Hinduism, IB Tauris, , pp. 35–37 Historically, the term has also be ...
population
Population is a set of humans or other organisms in a given region or area. Governments conduct a census to quantify the resident population size within a given jurisdiction. The term is also applied to non-human animals, microorganisms, and pl ...
by Aurangzeb (1679), was finally abolished by the
Emperor
The word ''emperor'' (from , via ) can mean the male ruler of an empire. ''Empress'', the female equivalent, may indicate an emperor's wife (empress consort), mother/grandmother (empress dowager/grand empress dowager), or a woman who rules ...
Muhammad Shah in 1720. In 1728, Jai Singh prevailed on him to also withdraw the
pilgrimage
A pilgrimage is a travel, journey to a holy place, which can lead to a personal transformation, after which the pilgrim returns to their daily life. A pilgrim (from the Latin ''peregrinus'') is a traveler (literally one who has come from afar) w ...
tax
A tax is a mandatory financial charge or levy imposed on an individual or legal entity by a governmental organization to support government spending and public expenditures collectively or to regulate and reduce negative externalities. Tax co ...
on
Hindus
Hindus (; ; also known as Sanātanīs) are people who religiously adhere to Hinduism, also known by its endonym Sanātana Dharma. Jeffery D. Long (2007), A Vision for Hinduism, IB Tauris, , pp. 35–37 Historically, the term has also be ...
at
Gaya.
In 1719, he was witness to a noisy controversy in the court of
Mughal Emperor
The emperors of the Mughal Empire, who were all members of the Timurid dynasty (House of Babur), ruled the empire from its inception on 21 April 1526 to its dissolution on 21 September 1857. They were supreme monarchs of the Mughal Empire in ...
Muhammad Shah. The argument concerned astronomical calculations intended determine an auspicious date on which the emperor could start a journey. This discussion led Jai Singh to believe that the nation needed to be educated on the subject of
astronomy
Astronomy is a natural science that studies celestial objects and the phenomena that occur in the cosmos. It uses mathematics, physics, and chemistry in order to explain their origin and their overall evolution. Objects of interest includ ...
. His interest may have been kindled as early as 1702 by his tutor Jagannatha Samrat. Despite local wars, foreign invasions, and consequent turmoil, Jai Singh found time and energy to build astronomical
observatories
An observatory is a location used for observing terrestrial, marine, or celestial events. Astronomy, climatology/meteorology, geophysics, oceanography and volcanology are examples of disciplines for which observatories have been constructed.
Th ...
.

He ordered the construction of five such buildings—at
Delhi
Delhi, officially the National Capital Territory (NCT) of Delhi, is a city and a union territory of India containing New Delhi, the capital of India. Straddling the Yamuna river, but spread chiefly to the west, or beyond its Bank (geography ...
,
Mathura
Mathura () is a city and the administrative headquarters of Mathura district in the states and union territories of India, Indian state of Uttar Pradesh. It is located south-east of Delhi; and about from the town of Vrindavan. In ancient ti ...
(in his Agra province),
Benares
Varanasi (, also Benares, Banaras ) or Kashi, is a city on the Ganges, Ganges river in North India, northern India that has a central place in the traditions of pilgrimage, death, and mourning in the Hinduism, Hindu world.*
*
*
* The city ...
,
Ujjain (capital of his Malwa province), and his own capital of
Jaipur
Jaipur (; , ) is the List of state and union territory capitals in India, capital and the List of cities and towns in Rajasthan, largest city of the north-western States and union territories of India, Indian state of Rajasthan. , the city had ...
. His astronomical observations were remarkably accurate. He drew up a set of tables, entitled ''Zij-i-Muhammadshahi'', to enable people to make astronomical observations. He instigated the translation into Sanskrit of Euclid's ''Elements of Geometry'', several works on trigonometry, and Napier's work on the construction and use of logarithms.
Relying primarily on
Indian astronomy
Astronomy has a long history in the Indian subcontinent, stretching from History of India, pre-historic to History of India (1947–present), modern times. Some of the earliest roots of Indian astronomy can be dated to the period of Indus Valle ...
, his observatories were used to accurately predict eclipses and other astronomical events. The observational techniques and instruments used in his observatories were also superior to those used by the European
Jesuit
The Society of Jesus (; abbreviation: S.J. or SJ), also known as the Jesuit Order or the Jesuits ( ; ), is a religious order (Catholic), religious order of clerics regular of pontifical right for men in the Catholic Church headquartered in Rom ...
astronomers he invited to his observatories. Termed as the
Jantar Mantar, they consisted of the ''Ram Yantra'' (a cylindrical building with an open top and a pillar in its center), the ''Jai Prakash'' (a concave hemisphere), the ''Samrat Yantra'' (a huge equinoctial dial), the ''Digamsha Yantra'' (a pillar surrounded by two circular walls), and the ''Narivalaya Yantra'' (a cylindrical dial).

The ''Samrat Yantra'' is a huge
sundial
A sundial is a horology, horological device that tells the time of day (referred to as civil time in modern usage) when direct sunlight shines by the position of the Sun, apparent position of the Sun in the sky. In the narrowest sense of the ...
. It can be used to estimate the
local time, to locate the
Pole Star
A pole star is a visible star that is approximately aligned with the axis of rotation of an astronomical body; that is, a star whose apparent position is close to one of the celestial poles. On Earth, a pole star would lie directly overhead when ...
, and to measure the
declination
In astronomy, declination (abbreviated dec; symbol ''δ'') is one of the two angles that locate a point on the celestial sphere in the equatorial coordinate system, the other being hour angle. The declination angle is measured north (positive) or ...
of celestial objects. The ''Rama Yantra'' can be used to measure the
altitude
Altitude is a distance measurement, usually in the vertical or "up" direction, between a reference datum (geodesy), datum and a point or object. The exact definition and reference datum varies according to the context (e.g., aviation, geometr ...
and
azimuth
An azimuth (; from ) is the horizontal angle from a cardinal direction, most commonly north, in a local or observer-centric spherical coordinate system.
Mathematically, the relative position vector from an observer ( origin) to a point ...
of celestial objects. The ''Shanku Yantra'' can be used to measure the
latitude
In geography, latitude is a geographic coordinate system, geographic coordinate that specifies the north-south position of a point on the surface of the Earth or another celestial body. Latitude is given as an angle that ranges from −90° at t ...
of the place.
[
Jai Singh's greatest achievement was the construction of the city of ]Jaipur
Jaipur (; , ) is the List of state and union territory capitals in India, capital and the List of cities and towns in Rajasthan, largest city of the north-western States and union territories of India, Indian state of Rajasthan. , the city had ...
(known originally as Jai Nagara in Sanskrit and as the 'city of victory' and later as the 'pink city' by the British by the early 20th century). The planned city later became the capital of the Indian state of Rajasthan. Construction of the new capital began as early as 1725, although it was only in 1727 that the foundation stone was ceremonially laid. By 1733, Jaipur officially replaced Amber as the capital of the Kachawahas. Built on the ancient Hindu grid pattern, found in the archaeological ruins of 3000 BCE, it was designed by Vidyadhar Bhattacharya, who was educated in the ancient Sanskrit manuals on city-planning and architecture (''silpa-sutras''). Merchants from all over India settled down in the relative safety of this rich city, protected by thick walls and a garrison of 17,000 (including adequate artillery). The Sanskrit epic 'Ishvar Vilas Mahakavya', written by Kavikalanidhi Devarshi Shrikrishna Bhatt, recounts various important events of that era, including the construction of Jaipur city, in detail.
Jai Singh also translated works by people like John Napier
John Napier of Merchiston ( ; Latinisation of names, Latinized as Ioannes Neper; 1 February 1550 – 4 April 1617), nicknamed Marvellous Merchiston, was a Scottish landowner known as a mathematician, physicist, and astronomer. He was the 8 ...
. For these multiple achievements, Jai Singh II is remembered as the most enlightened king of 18th-century India
India, officially the Republic of India, is a country in South Asia. It is the List of countries and dependencies by area, seventh-largest country by area; the List of countries by population (United Nations), most populous country since ...
even to this date. These days Jai Singh's observatories at Jaipur
Jaipur (; , ) is the List of state and union territory capitals in India, capital and the List of cities and towns in Rajasthan, largest city of the north-western States and union territories of India, Indian state of Rajasthan. , the city had ...
, Varanasi
Varanasi (, also Benares, Banaras ) or Kashi, is a city on the Ganges river in northern India that has a central place in the traditions of pilgrimage, death, and mourning in the Hindu world.*
*
*
* The city has a syncretic tradition of I ...
, and Ujjain are functional. Only the one at Delhi is not functional and the one at Mathura
Mathura () is a city and the administrative headquarters of Mathura district in the states and union territories of India, Indian state of Uttar Pradesh. It is located south-east of Delhi; and about from the town of Vrindavan. In ancient ti ...
disappeared a long time ago.[Sharma, Virendra Nath (1995), ''Sawai Jai Singh and His Astronomy'', Motilal Banarasidass, ]
See also
* House of Kachwaha
* List of Rajputs
References
Bibliography
#Bhatnagar, V. S. (1974) ''Life and Times of Sawai Jai Singh, 1688-1743'', Delhi: Impex India
#Sarkar, Jadunath (1984, reprint 1994) ''A History of Jaipur'', New Delhi: Orient Longman,
#Jyoti J. (2001) ''Royal Jaipur'', Roli Books,
#Tillotson G, (2006) ''Jaipur Nama'', Penguin books
Penguin Books Limited is a Germany, German-owned English publishing, publishing house. It was co-founded in 1935 by Allen Lane with his brothers Richard and John, as a line of the publishers the Bodley Head, only becoming a separate company the ...
#Schwarz, Michiel (1980) ''Observatoria : De astronomische instrumenten van Maharaja Sawai Jai Singh II in New Delhi, Jaipur, Ujjain en Benares'', Amsterdam: Westland/Utrecht Hypothekbank
#Sharma, Virendra Nath (1995, revised edition 2016) ''Sawai Jai Singh and his Astronomy'', Delhi: Motilal Barnasidass Publishers
External links
Genealogy of the rulers of Jaipur
(archived 7 December 2006)
{{DEFAULTSORT:Jai Singh 02 Of Amber
1688 births
1743 deaths
Maharajas of Jaipur
Indian city founders
Subahdars of Malwa
Scientists from Rajasthan
18th-century Indian astronomers
18th-century Indian mathematicians
18th-century Indian monarchs
Scholars from Rajasthan
18th-century Mughal Empire people