Luckily with Brunello, there's an easy way to find out. Plugging the government seal from the top of the bottle into the traceability tool (near the bottom of the page) at the Consorzio del vino ...

While even the most famous Brunello di Montalcino wines are cuvees from a variety of estate vineyards, one producer in the region, Cortonesi, focuses entirely on single vineyard expressions of ...