Giacomo Marengo produces Nebbiolo-based Barolos from the Langhe region of Piemonte, where the continental climate and limestone-rich soils of northern Italy's most prestigious wine zone shape wines of structure and age-worthiness. The winery's Cerequio Barolo and Fontanazza Barolo represent the house's core expression of the variety—Nebbiolo's characteristic tannins and aromatics filtered through the specific terroir of their vineyard sites. A Sangiovese rosso, Tenuta del Fondatore Stroncoli, rounds out the portfolio. Wine Spectator, Wine Enthusiast, and Wine Advocate have all assessed the winery's releases, reflecting their standing within the critical conversation around Langhe Barolo.