DOC area for red, rosé and white wines in the Italian region of Piedmont, named after the former marquisate. It is considered one of the oldest wine-growing areas or perhaps even the origin of viticulture in Piedmont, as evidenced by numerous finds of amphorae and artefacts. The extensive zone covers around 1,200 hectares of vineyards in a total of 229 municipalities in the two provinces of Asti (116) and Alessandria (113). The Monferrato Casalese subzone comprises 39 municipalities in the province of Alessandria, for which there is also the independent DOC area Grignolino del Monferrato Casalese. Other independent Monferrato enclaves are Barbera del Monferrato and Cortese dell'Alto Monferrato.