The foundry at Domus Orsoni was opened in 1888 by Angelo Orsoni, and his great-grandson, Lucio, has carried on the family tradition and is now the honorary president. Here, he stands in front of a 24k gold leaf mosaic, and explains how his family foundry has made glass for the Sagrada Familia in Barcelona, and the Roman Pool at Hearst Castle in San Simeon.