The Castelli del Grevepesa (Castelgreve) is the largest producer of Chianti Classico, producing 15% of all Chianti Classico in the world. Castelli del Grevepesa is actually a cooperative, owned by 160-170 grape growers in the Classico area who bring only the best grapes to the sight for production.

The grapes are meticulously selected from the rugged hills at the optimum altitude of 300-350 meters. The aging facility of this cooperative is truly extraordinary. The fine grapes are grown in a nearly perfect season and the use of modern techniques, along with aging in Allier barrique, results in a superb Chianti Classico Riserva. Chianti Classico is one of the most well-known wines from Italy.

There are several different types of Chianti wines, these being Chianti, Chianti Classico, and Chianti Classico Riserva. Chianti comes from seven different regions in Tuscany, whereas Chianti Classico and Chianti Classico Riserva come from only a very small area in Tuscany. Chianti Classico has stricter guidelines as to the percentage of Sangiovese, Canaiolo, Malvasia and Trebbiano grapes in the wine, the yield from the vineyard and the grapes, and the aging requirements. These standards help to create a Chianti Classico wine which is softer, fuller in structure, and of a higher quality.