A breakthrough in non-invasive archaeological technology has allowed a joint team of Indian and Japanese researchers to map a previously unknown network of subterranean chambers beneath the Great Stupa at Sanchi. Utilizing Muon-Resonance Imaging, a technique that uses cosmic-ray subatomic particles to peer through solid stone, the team identified three distinct voids located approximately ten meters below the main foundation of the 2,000-year-old monument.
Preliminary data suggests these chambers may predate the current Mauryan-era structure, potentially serving as earlier ritual enclosures or storage for sacred relics. This technology is particularly significant because it allows for the exploration of sensitive religious sites without the need for destructive excavation. The Archaeological Survey of India is currently reviewing the data to determine how these findings may change our understanding of the early development of Buddhist architectural complexes in India.