Baker's remains are in a sarcophagus within the Grotto Shrine to Our Lady of Lourdes, found on the southern end of the Basilica's transept. The Grotto is hewn out of black lava rock from Mount Vesuvius in Italy. Baker, who had died in 1936, had wanted to find a construction material that was untouched by humans to commemorate the vision of the Blessed Mother to St. Bernadette in Lourdes, France.