The so-called Courtyard of the Belvedere in Rome, to the North of the Basilica of St. Peter. It was built in the XVI century by order of pope Julius II. And, now, you are painting. Which would not be anything exceptional if it were not for what they are doing with milk.
This substance is widely used to paint walls and surfaces from the most remote antiquity. The used by the egyptians and also many of the pre-columbian peoples. But, recent investigations have revealed that the casein, a milk protein, have excellent properties that helps that the painted walls are preserved for a long time. For this reason, the technique of painting with milk is resurfacing in the present.
In the case of this roman palace, the engineers are mixing the milk with lime and natural pigments, to give the walls the shade cream color that I had originally. In addition, the milk used comes from the udders of the cows pontifical, which are bred on the farm that the Vatican has in Castel Galdonfo, about 30 kilometers from Rome. Are, in total, twenty-five cattle that produce an average of fifty liters of milk per day, which are processed in a pasteurizer that there is on the premises.
In the farm also take care of about three hundred hens, there are dozens of beehives that produce honey, and several hectares of olive trees from which is obtained an average of 3,000 liters of oil. A part of the products that come out of here ends up in the table of the pope, but the rest on offer in a supermarket of Annona, a term used in Italy to refer to the agencies to distribute food among the needy.
But, back to the technique of painting with milk, its adoption should also be an attempt of the restoration of the palace Belvedere conform to the ecological guidelines that Pope Francis has set out in his encyclicals.