The royal couple were presented with a red and white floral tribute on the banks of the River Ganges during a sacred Hindu ceremony.
Charles and Camilla were welcomed by the Hindu guru Swami Chidanand and his leading disciple Sadhvi Bhagawati Saraswati, who draped a garland of marigold blooms around their necks and strings of beads.
Both offered prayers of their own during the ritual, which took place in the holy Hindu city of Rishikesh, where The Beatles famously studied transcendental meditation in 1968.
The site is a popular location among backpackers, yoga fanatics and those seeking spiritual salvation.
Devotees performed the daily sunset Aarti ceremony, waving oil lamps burning ghee – a symbolic thank you to God for lighting the world.
“It is a particular joy to join you here on the banks of the Ganges this evening,” said Charles, addressing the gathered trainee priests and their leaders.
“It is, above all else, my first visit to the Ganges and so from that point of view it is a very special occasion for both myself and my wife.”
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