Anselmo Guerrieri Gonzaga, the owner of Italian winery Tenuta San Leonardo, sits down with James to talk about the history and current winemaking style of San Leonardo. "All our red wines are still only made in concrete vats," Anselmo says. "We do not use any stainless steel. There is no refrigeration, no heating, no [commercial] yeasts, we only use indigenous yeasts."He adds: "I am not against technology, it's just that in this area, the climate is so fine that it's easy to make red wines, and we can do them in a proper way to respect the terroir."