What do a giant sundial, a protest landmark and an international art festival have in common? They are all part of the fascinating story of Delhi's Jantar Mantar!

The historic observatory, which once helped astronomers study the movement of celestial bodies, is preparing for a new role. It has been added as a venue for India Biennale 2026, a 108-day celebration of art, architecture and design organised by the Ministry of Culture, Government of India.

Scheduled from December 4, 2026, to March 21, 2027, the festival will bring exhibitions and cultural experiences to some of Delhi's most recognisable monuments and public spaces.

But this announcement is more than just another venue addition. Jantar Mantar has a fascinating past, from its scientific beginnings to its association with public protests. Its inclusion in the Biennale gives Delhiites another reason to look at this familiar landmark differently.

Why Is Jantar Mantar Joining India Biennale 2026?

The decision is part of a larger plan to bring contemporary art and culture into Delhi's historical spaces.

According to Hindustan Times, the official Biennale website was updated on October 29, 2026, to include the observatory. The official venue directory also lists it among the participating locations.

Vivek Aggarwal, Secretary, Ministry of Culture, explained the idea behind this approach while speaking to Hindustan Times last month.

He said:

"We should make our monuments into live cultural spaces and open them up so that [visitors] can not only enjoy history but also get a glimpse of the contemporary art scene of India."

He also summed up the vision with a simple statement: "The whole of Delhi will be a stage."

The idea is to make heritage sites more engaging for visitors. Instead of simply walking around old monuments, people can experience contemporary art, architecture and design in these historical surroundings.

What Is India Biennale 2026? Dates, Duration and Key Details

The India Biennale 2026 is the second edition of the India Art, Architecture and Design Biennale. Its first edition took place in 2023.

Here are the important details:

• Dates: December 4, 2026 - March 21, 2027
• Duration: 108 days
• Organiser: Ministry of Culture, Government of India
• Focus: Art, architecture and design
• Central venue: Purana Qila
• Theme: Tat Tvam Asi – You Are That

The theme draws inspiration from an ancient Upanishadic expression that explores the connection between individuals and the world around them.

The festival will bring together exhibitions, installations, performances, talks, workshops and public programmes. It will use heritage monuments, museums, galleries and public spaces across Delhi as part of one connected cultural experience.

For visitors, this means discovering familiar places through a fresh creative perspective.

Jantar Mantar History: From Studying Stars to Becoming a Protest Landmark

Built in the early 18th century, Delhi's Jantar Mantar was commissioned by Maharaja Jai Singh II of Jaipur, a ruler with a keen interest in astronomy.

The observatory is commonly dated to 1724. However, historical documentation by the Indira Gandhi National Centre for the Arts notes some uncertainty about its exact construction year, with different historical accounts mentioning 1710 and 1724.

It was one of five astronomical observatories built under his direction. The others were established in Jaipur, Ujjain, Varanasi and Mathura.

Unlike modern observatories that depend on telescopes, its large masonry instruments helped astronomers study celestial movements using the Sun's position and carefully designed structures.

Three instruments deserve special attention:

Samrat Yantra: A massive sundial that uses the Sun's shadow to measure local time.

Ram Yantra: A pair of circular structures used to measure the altitude and azimuth of celestial objects.

Jai Prakash Yantra: Two concave structures that help determine the positions of celestial bodies.

There is another interesting fact worth knowing. Delhi's observatory is different from Jaipur's Jantar Mantar. Both were built under Maharaja Jai Singh II, but Jaipur's observatory holds UNESCO World Heritage status. That designation does not apply to the Delhi monument.

Over the years, the observatory also became one of Delhi's familiar locations for public demonstrations, hunger strikes and protest movements. Its central location made it an important gathering point for people who wanted to raise public concerns.

Why Was Jantar Mantar Denotified as a Protest Site?

The cultural announcement comes shortly after an important administrative development.

In October 2026, Delhi Police denotified Jantar Mantar as a designated protest site following Supreme Court observations made on October 9. The court called for suitable alternative locations where people could exercise their right to peaceful protest while maintaining public safety.

Delhi Police identified three alternative locations:

1. Ramlila Maidan in Central Delhi.
2. Burari Ground in North Delhi.
3. CBD Ground in East Delhi.

This development is significant because the observatory had been associated with public demonstrations for years. However, the removal of its designated protest-site status should not be confused with a general ban on peaceful demonstrations across Delhi.

The two developments have happened close together, but the administrative decision and the Biennale's venue selection are separate matters.

Which Other Delhi Monuments Will Host the Biennale?

Jantar Mantar is joining a wider list of historical and cultural locations across the capital.

The 16th-century Purana Qila will serve as the central hub of the festival and bring together participating museums, galleries, foundations and creative organisations.

Other participating locations include:

• Red Fort
• Qutub Minar
• Lodhi Garden
• Agrasen Ki Baoli
• Humayun's Tomb
• Safdarjung Tomb
• Hauz Khas
• National Museum
• National Gallery of Modern Art
• Indira Gandhi National Centre for the Arts

The official India Biennale venue directory provides the updated list of participating locations.

Who Is Participating in India Biennale 2026?

The festival will bring together architecture and design firms, art galleries and public and private cultural institutions.

Some of the prominent participants mentioned by Hindustan Times include:

• National Gallery of Modern Art (NGMA)
• Kiran Nadar Museum of Art
• Nita Mukesh Ambani Cultural Centre
• JSW Foundation
• DAG (formerly Delhi Art Gallery)

Their participation will bring different creative communities together and offer visitors an opportunity to discover a wider range of Indian art, architecture and design.

Why This New Chapter Matters for Delhi

From helping astronomers understand the skies to becoming a familiar address for public demonstrations, this historic observatory has witnessed several sides of Delhi's changing story.

Now, its inclusion in the Biennale offers another reason to revisit the capital's heritage. Visitors will have an opportunity to experience contemporary creativity alongside historical architecture rather than viewing monuments only as reminders of the past.

If you enjoy exploring Delhi, appreciating art or discovering interesting stories behind familiar landmarks, keep December 4, 2026, in mind. Check the official India Biennale website for the latest exhibition details, venue information and visitor updates before planning your visit.

Jantar Mantar has spent nearly three centuries telling stories about time and the stars. This December, it becomes part of a much bigger conversation about India's art, architecture and cultural heritage.