Castelli del Grevepesa, a wine co-operative, was established in 1965 by a small group of eighteen winegrowers in Tuscany on the initiative of Mr. Gualtiero Armando Nunzi. They intended to bring together a group of people from different areas of the Chianti Classico region whose common purpose was to preserve the centuries-old traditions of the Tuscan viticulture. Since its foundation, Castelli del Grevepesa has concentrated on producing high-quality wines by carefully selecting the grapes and by complying with the strict regulations of the Law and the Consorzio "Gallo Nero" (Black Rooster).During the vegetative period and the harvest, their agronomist team scrupulously follows the members' vineyards, checking the status according to the weather conditions. After the members transfer their total yield to the Winery Castelli del Grevepesa, the grapes are controlled in the co-operative's own laboratory from their arrival up to the bottling phase. The cellar team carry out these controls under the direction of the enologist, Stefano Mosele, who, together with some other Enologists, oversee the whole vinification process. They have to pay attention to the particular types of grapes, their varieties and characteristics, especially to the alcoholic fermentation, the racking, the control of malolactic fermentation, and the following decanting, refinement, and aging phase in casks and barrique (French barrels). All operations carried out, from the vineyards, up to the bottling process, take place under the supervision of the General Manager, the agronomist, and enologist Ugo Pagliai.