Siro Pacenti produces Brunello di Montalcino in central Tuscany, where Sangiovese thrives in the region's clay and limestone soils. The winery's portfolio centers on expressions of this demanding varietal: Vecchie Vigne Brunello di Montalcino, Brunello di Montalcino Riserva, and Pelagrilli Brunello di Montalcino. Each represents the classical structure and aging potential that define the appellation—wines built on tannin, acidity, and the mineral character of Montalcino's terroir. Sangiovese at this level demands patience; these are not immediate wines, but rather bottles that unfold over years in the glass and cellar. The winery's work has drawn assessment from Wine Enthusiast, Wine Advocate, Falstaff, Wine Spectator, and Decanter.