Facebook’s Mark Zuckerberg reportedly has bought an Italian castle in the region of Piedmont. If he indeed purchased Lavezzole Castle on the Alfieri hillside between Asti and Alba, then I think he’s neighboring one of my favorite wineries in Italy, Marchesi Alfieri. Sisters Emanuela, Antonella and Giovanna San Martino di San Germano are the proud proprietors of Marchesi Alfieri, a wine estate, …