{"id":113584,"date":"2026-07-17T12:50:05","date_gmt":"2026-07-17T07:20:05","guid":{"rendered":"https:\/\/vajiramandravi.com\/current-affairs\/?p=113584"},"modified":"2026-07-17T12:50:05","modified_gmt":"2026-07-17T07:20:05","slug":"jantar-mantar","status":"publish","type":"post","link":"https:\/\/vajiramandravi.com\/current-affairs\/jantar-mantar\/","title":{"rendered":"Jantar Mantar, History, Architecture, UNESCO Status, Protests"},"content":{"rendered":"<p><span style=\"font-weight: 400;\">Jantar Mantar is one of India&#8217;s finest examples of scientific knowledge, architecture and astronomy coming together in a single monument. It was built during the early eighteenth century under Maharaja Sawai Jai Singh II. These observatories were designed to measure time, track celestial bodies and perform other astronomical activities.\u00a0<\/span><\/p>\n<h2><b>What is Jantar Mantar?<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">The name \u2018Jantar Mantar\u2019 is derived from the Sanskrit words \u2018Yantra\u2019 meaning instrument and \u2018Mantra\u2019 meaning calculation. Together, they refer to instruments used for astronomical calculations. These observatories consist of large structures built for naked eye observations of the Sun, Moon, planets and stars. Their primary purpose was to determine time, predict eclipses, calculate planetary movements, prepare astronomical tables and improve the accuracy of astronomical observations using permanent masonry instruments.<\/span><\/p>\n<h2><b>Jantar Mantar History<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">The historical development and evolution of Jantar Mantar has been discussed below:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Maharaja Sawai Jai Singh II (1693-1744), founder of Jaipur, commissioned the Jantar Mantars because of his deep interest in Indian, Islamic and European astronomy and the need for more accurate astronomical observations.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">The observatories were constructed between 1724 and 1735.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">The observatories followed the tradition of Ptolemaic positional astronomy, allowing astronomers to observe celestial bodies directly with the naked eye and compile astronomical tables called Zij.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">By 1735, nearly 23 astronomers worked at Jaipur, making it the principal astronomical research centre.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Following Jai Singh II&#8217;s death in 1743, succession disputes reduced royal patronage, scientific activity declined and portions of the Jaipur observatory were later converted into a weapons factory.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Maharaja Ram Singh restored the Jaipur observatory in 1876, strengthening several instruments using stone repairs and lead reinforcement before another restoration under Madho Singh II in 1901.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Jaipur Jantar Mantar became a Monument of National Importance in 1968 and was inscribed as a UNESCO World Heritage Site in 2010 because of its outstanding scientific and architectural value.<\/span><\/li>\n<\/ul>\n<h2><b>How many Jantar Mantar in India?<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">Maharaja Sawai Jai Singh II established five Jantar Mantars at <strong>Delhi<\/strong>, <strong>Jaipur<\/strong>, <strong>Ujjain<\/strong>, <strong>Varanasi<\/strong> and <strong>Mathura<\/strong> during the early eighteenth century. Today only four Jantar Mantars remain, as the Mathura observatory was destroyed shortly before the <strong><a href=\"https:\/\/vajiramandravi.com\/upsc-exam\/revolt-of-1857\/\" target=\"_blank\">Revolt of 1857<\/a><\/strong>.<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\"><strong>Oldest Jantar Mantar Observatory<\/strong>: The Delhi Jantar Mantar, completed in 1724, is the oldest surviving observatory among the remaining four.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\"><strong>Largest Jantar Mantar Observatory<\/strong>: The Jaipur Jantar Mantar is the largest, most comprehensive and best preserved observatory, containing 19 astronomical instruments and the world&#8217;s largest stone sundial.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\"><strong>UNESCO Recognized Jantar Mantar<\/strong>: The Jantar Mantar at Jaipur became a <strong><a href=\"https:\/\/vajiramandravi.com\/upsc-exam\/unesco-world-heritage-sites-in-india\/\" target=\"_blank\">UNESCO World Heritage Site<\/a><\/strong> in 2010, making it internationally recognised for its scientific, architectural and cultural importance.<\/span><\/li>\n<\/ul>\n<h2><b>Jantar Mantar Architecture<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">The key architectural features of Jantar Mantar buildings has been discussed below:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\"><strong>Construction Material<\/strong>: The observatories were built primarily using stone, marble, plaster and masonry, ensuring greater durability and measurement stability than contemporary metal instruments.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\"><strong>Observation Method<\/strong>: All observations were performed with the naked eye, allowing astronomers to determine celestial positions without telescopes while maintaining remarkable accuracy.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\"><strong>Instruments<\/strong>: The architecture involves several instruments across all four existing Jantar Mantars as highlighted below:<\/span>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"2\"><span style=\"font-weight: 400;\"><strong>Samrat Yantra<\/strong>: Standing about 27 metres high, it is the world&#8217;s largest stone sundial and can measure time with an accuracy of nearly two seconds.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"2\"><span style=\"font-weight: 400;\"><strong>Jai Prakash Yantra<\/strong>: This hemispherical instrument helps determine the positions, altitude, azimuth, declination and hour angle of celestial bodies by projecting an inverted image of the sky.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"2\"><span style=\"font-weight: 400;\"><strong>Ram Yantra<\/strong>: Designed as an upright cylindrical structure, it accurately measures the altitude and azimuth of the Sun and other celestial bodies.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"2\"><span style=\"font-weight: 400;\"><strong>Misra Yantra<\/strong>: Located at Delhi, this composite instrument consists of five different devices and helps determine the shortest and longest days of the year.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"2\"><span style=\"font-weight: 400;\"><strong>Rashi Valaya Yantra<\/strong>: Comprising twelve separate instruments, it measures planetary positions according to the twelve zodiac constellations.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"2\"><span style=\"font-weight: 400;\"><strong>Laghu Samrat Yantra<\/strong>: A smaller sundial inclined at approximately 27 degrees, it measures local time with reasonable accuracy though less precise than the Vrihat Samrat Yantra.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"2\"><span style=\"font-weight: 400;\"><strong>Nadi Valaya Yantra<\/strong>: This consists of two sundials representing the northern and southern hemispheres and measures local solar time with accuracy of less than one minute.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"2\"><span style=\"font-weight: 400;\"><strong>Chakra Yantra<\/strong>: Four semicircular arcs determine the Sun&#8217;s declination at different times, similar to comparing local times across different world locations.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"2\"><span style=\"font-weight: 400;\"><strong>Dakshin Bhitti Yantra<\/strong>: It measures meridian positions, zenith distance and altitude of celestial bodies during their daily movement across the sky.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"2\"><span style=\"font-weight: 400;\"><strong>Digamsha Yantra<\/strong>: Used for determining the Sun&#8217;s azimuth while helping calculate sunrise and sunset timings.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"2\"><span style=\"font-weight: 400;\"><strong>Disha Yantra<\/strong>: This instrument accurately determines geographical directions based on astronomical observations.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"2\"><span style=\"font-weight: 400;\"><strong>Dhruva Darshak Yantra<\/strong>: Designed specifically to observe the Pole Star and determine its position relative to other celestial objects.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"2\"><span style=\"font-weight: 400;\"><strong>Kranti Vritta Yantra<\/strong>: It measures the celestial latitude and longitude of heavenly bodies with considerable precision.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"2\"><span style=\"font-weight: 400;\"><strong>Shastanadan Yantra<\/strong>: A dark chamber with a sixty degree meridian arc measures solar declination, zenith distance and even the apparent diameter of the Sun.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"2\"><span style=\"font-weight: 400;\"><strong>Unnatamsa Yantra<\/strong>: A metal ring divided into four segments helps determine the altitude of celestial bodies.<\/span><\/li>\n<\/ul>\n<\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\"><strong>Scientific Basis<\/strong>: The observatories draw upon astronomical theories developed by Aryabhatta, Brahmagupta, Varahamihira, Lalla, Sripati and Bhaskara, whose works described several astronomical instruments and calculation methods.<\/span><\/li>\n<\/ul>\n<h2><b>Jantar Mantar Delhi<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">The Jantar Mantar in Delhi is the oldest surviving observatory and continues to remain both a protected monument and an important public gathering location.<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\"><strong>Construction<\/strong>: Built in 1724, it became the first surviving observatory established by Maharaja Sawai Jai Singh II.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\"><strong>Size<\/strong>: It is the second largest Jantar Mantar after Jaipur and contains several important astronomical instruments.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\"><strong>Purpose<\/strong>: The observatory was designed for accurate timekeeping, determining planetary positions and measuring celestial movements.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\"><strong>Instrument<\/strong>: The Misra Yantra is unique to Delhi and calculates the shortest and longest days of the year.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\"><strong>Protection<\/strong>: The monument is maintained by the <strong><a href=\"https:\/\/vajiramandravi.com\/current-affairs\/archaeological-survey-of-india\/\" target=\"_blank\">Archaeological Survey of India<\/a><\/strong> (ASI) as a protected monument of national importance.<\/span><\/li>\n<\/ul>\n<h2><b>Jantar Mantar Jaipur<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">The Jantar Mantar in Jaipur represents the highest achievement of India&#8217;s historic astronomical observatories through its scale, preservation, scientific innovation and global recognition.<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\"><strong>Construction<\/strong>: The observatory was completed in 1734 and remained Maharaja Jai Singh II&#8217;s principal astronomical centre.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\"><strong>Instruments<\/strong>: It houses 19 major fixed astronomical instruments, many of which are the largest masonry examples of their kind.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\"><strong>UNESCO Status<\/strong>: It was inscribed as a UNESCO World Heritage Site in 2010 because of its outstanding universal scientific and architectural value.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\"><strong>Scientific Importance<\/strong>: The observatory contributed to astronomical tables and observations following the Ptolemaic positional astronomy tradition practiced across several civilizations.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\"><strong>Largest Sundial<\/strong>: The Samrat Yantra remains the world&#8217;s largest stone sundial with an accuracy of nearly two seconds.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\"><strong>Purpose<\/strong>: It measured time, predicted eclipses, calculated planetary movements and prepared astronomical tables through direct celestial observation.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\"><strong>National Recognition<\/strong>: The observatory was declared a Monument of National Importance in 1968.<\/span><\/li>\n<\/ul>\n<h2><b>Jantar Mantar Ujjain<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">Ujjain Jantar Mantar served as an important astronomical centre because of the city&#8217;s long standing association with astronomical calculations and observations.<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Construction: The Ujjain observatory was completed in 1725 under Maharaja Sawai Jai Singh II.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Role: It functioned as an important centre for astronomical research and observation of celestial events.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Instrument: It contains one of the largest sundials among the Jantar Mantar observatories.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Purpose: Astronomers used it for measuring time, tracking celestial bodies and improving astronomical calculations.<\/span><\/li>\n<\/ul>\n<h2><b>Jantar Mantar Varanasi<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">The Varanasi Jantar Mantar observatory continued Maharaja Jai Singh II&#8217;s scientific programme through smaller but essential astronomical instruments for celestial observations.<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Establishment: The observatory was established in 1737 as one of the final Jantar Mantars.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Scale: Although smaller than Jaipur and Delhi, it contains essential astronomical instruments for scientific observations.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Purpose: It was designed mainly for measuring time and tracking planetary and stellar movements.<\/span><\/li>\n<\/ul>\n<h2><b>Jantar Mantar Mathura<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">The Jantar Mantar in Mathura marked the beginning of Maharaja Jai Singh II&#8217;s observatory programme but unfortunately no longer survives.<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Construction: Built in 1711, it is considered the earliest Jantar Mantar established by Jai Singh II.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Historical Importance: It served as the foundation for the later observatories constructed at Delhi, Jaipur, Ujjain and Varanasi.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Destruction: The observatory was destroyed shortly before the Revolt of 1857, leaving only historical records of its existence.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Present Status: No substantial remains survive today, making it the only lost observatory among the original five.<\/span><\/li>\n<\/ul>\n<h2><b>Jantar Mantar Protests<\/b><\/h2>\n<p><span style=\"font-weight: 400;\">The Jantar Mantar in Delhi evolved into a major democratic protest site while remaining a protected heritage monument, creating administrative and legal challenges.<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\"><strong>Protest Centre<\/strong>: During the 1990s, Jantar Mantar became Delhi&#8217;s principal location for organised public demonstrations.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\"><strong>Major Movements<\/strong>: The site hosted significant protests including the Anna Hazare anti corruption movement, demonstrations seeking justice for Rohith Vemula, farmers&#8217; protests, anti lynching campaigns, gatherings supporting free speech and recent <strong><a href=\"https:\/\/vajiramandravi.com\/current-affairs\/sonam-wangchuk-detained-under-nsa-key-facts-on-preventive-detention-law\/\" target=\"_blank\">Sonam Wangchuk\u2019s<\/a><\/strong> <strong><a href=\"https:\/\/vajiramandravi.com\/current-affairs\/hunger-strikes-as-a-tool-of-protest\/\" target=\"_blank\">Hunger Strike<\/a><\/strong> 2026 for Educational Reforms in India.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\"><strong>Administrative Control<\/strong>: Protest permissions are regulated by the Delhi Police under the Ministry of Home Affairs, while the monument itself remains protected by the Archaeological Survey of India (ASI).<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\"><strong>NGT Restrictions<\/strong>: In 2017, the <strong><a href=\"https:\/\/vajiramandravi.com\/upsc-exam\/national-green-tribunal\/\" target=\"_blank\">National Green Tribunal<\/a><\/strong> (NGT) restricted protests citing noise pollution, littering, sanitation problems, unauthorised loudspeakers, public inconvenience and the residential character of the locality.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\"><strong>Constitutional Position<\/strong>: The right to assemble peacefully without arms is guaranteed under <strong><a href=\"https:\/\/vajiramandravi.com\/current-affairs\/article-19-of-indian-constitution\/\" target=\"_blank\">Article 19<\/a><\/strong>(1)(b) but remains subject to reasonable restrictions under Article 19(3) in the interests of public order and national sovereignty.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\"><strong>Legal Debate<\/strong>: Discussions surrounding Jantar Mantar continue to balance the constitutional right to dissent, environmental concerns, heritage conservation, urban governance and effective regulation of public demonstrations.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\"><strong>Impact on Heritage<\/strong>: Continuous protests, heavy public movement, littering, vibration and unregulated sound systems raised concerns regarding preservation of the nearly three century old protected monument, requiring careful management between democratic activities and conservation.<\/span><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Jantar Mantar is in news as Sonam Wangchuk continues his hunger strike. Learn its history, architecture, observatories, UNESCO status, instruments, and role as Delhi&#8217;s protest site.<\/p>\n","protected":false},"author":26,"featured_media":113574,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[786],"tags":[5906,8726,8725,8736],"class_list":["post-113584","post","type-post","status-publish","format-standard","has-post-thumbnail","category-general-studies","tag-architecture","tag-art-and-architecture","tag-historical-monuments-of-india","tag-jantar-mantar","no-featured-image-padding"],"acf":[],"_links":{"self":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts\/113584","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/users\/26"}],"replies":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/comments?post=113584"}],"version-history":[{"count":3,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts\/113584\/revisions"}],"predecessor-version":[{"id":113613,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/posts\/113584\/revisions\/113613"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/media\/113574"}],"wp:attachment":[{"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/media?parent=113584"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/categories?post=113584"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vajiramandravi.com\/current-affairs\/wp-json\/wp\/v2\/tags?post=113584"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}