Why the Vatican is using milk to paint its buildings

(Delia Gallagher) The Belvedere Palace, which dates back to 1484 and houses precious art of the Vatican Museums, is currently being re-painted with milk. It’s an ancient recipe that has proven more lasting than any modern synthetic paints: “We’re not nostalgic for the past,” said the Vatican’s chief architect, Vitale Zanchettin. (…)