A new study has calculated the staggering cost of painting a room in Pompeii with Egyptian blue pigment. Researchers determined that covering the walls of a recently discovered "Blue Room," a sacred shrine, would have required between 2.7 and 4.9 kilograms of the prized synthetic pigment. Based on prices recorded by Pliny the Elder, this quantity of high-grade pigment would have cost between 50% and 90% of a Roman legionary's annual salary, highlighting it as an extreme luxury.
This analysis underscores the immense social and economic value of color in the ancient Roman world. Egyptian blue, a complex artificial pigment, was a status symbol as potent as architectural features, and its use in a private household shrine signifies the occupants' exceptional wealth and cultural sophistication. The study also demonstrates how modern scientific techniques, combined with historical texts, can provide vivid new insights into the economics and material culture of antiquity.