The Chianti region is actually split into eight sub-regions which all make wines of slightly different styles and of varying levels of quality. The oldest and most prestigious of these is "Chianti Classico". These wines that tend to be medium-bodied with rich tannins and have a fresh acidity. Sour cherry and light nutty notes are characteristic aromas with the wines expressing more notes on the mid-palate and finish than at the front of the mouth. In order to qualify for Riserva quality the wine must be aged at least 24 months at the winery, and have a minimum ABV of 12%.