She's one of the world's best-preserved bodies: Rosalia Lombardo, a two-year-old Sicilian girl who died of pneumonia in 1920. "Sleeping Beauty," as she's known, appears to be merely dozing beneath the glass front of her coffin in the Capuchin Catacombs of Palermo, Italy.
Now an Italian biological anthropologist, Dario Piombino-Mascali of the Institute for Mummies and the Iceman in Bolzano, has discovered the secret formula that preserved Rosalia's body so well. (Piombino-Mascali is funded by the National Geographic Society's Expeditions Council. National Geographic News is owned by the National Geographic Society.)
Piombino-Mascali tracked down living relatives of Alfredo Salafia, a Sicilian taxidermist and embalmer who died in 1933. A search of Salafia's papers revealed a handwritten memoir in which he recorded the chemicals he injected into Rosalia's body: formalin, zinc salts, alcohol, salicylic acid, and glycerin.
Formalin, now widely used by embalmers, is a mixture of formaldehyde and water that kills bacteria. Salafia was one of the first to use this for embalming bodies. Alcohol, along with the arid conditions in the catacombs, would have dried Rosalia's body and allowed it to mummify. Glycerin would have kept her body from drying out too much, and salicylic acid would have prevented the growth of fungi
But it was the zinc salts, according to Melissa Johnson Williams, executive director of the American Society of Embalmers, that were most responsible for Rosalia's amazing state of preservation. Zinc, which is no longer used by embalmers in the United States, petrified Rosalia's body.
"[Zinc] gave her rigidity," Williams said. "You could take her out of the casket prop her up, and she would stand by herself."
Piombino-Mascali calls the self-taught Salafia an artist: "He elevated embalming to its highest level."