In accordance with local custom, the royal couple slipped off their shoes – a pair of green snakeskin pumps for the Princess – as they paid tribute to Mahatma Gandhi at his memorial in Delhi.
At the site, the Prince and Princess honoured the great pacifist with an offering of vibrant red and yellow flowers, as well as a moment of silence.
The couple's first official visit to India began on Tuesday in Bombay with a conference on Spain and India's economic relations.
The trip continued with a special breakfast attended by the country's president, Pratibha Patil.
Felipe and Letizia also celebrated their own culture by inaugurating India's first Instituto Cervantes, an international organisation that promotes the Spanish language.