Duca di Castelmonte works within Terre Siciliane, the expansive wine region of southern Italy that encompasses Sicily's diverse terroirs and winemaking traditions. The winery's portfolio centers on varieties suited to the Mediterranean climate: Muscat of Alexandria, Zibibbo, and Syrah. The Passito di Pantelleria, made from Muscat of Alexandria, represents the winery's work with the island's signature sweet wine style—a wine of concentrated fruit and natural richness. The Zibibbo, crafted from the local white variety, and the Notorius Syrah, built on the dark-skinned grape, round out a range that spans Sicily's aromatic whites and structured reds. Decanter and Wine Enthusiast have rated wines from the portfolio.