The German wine growing region of Franconia used to be divided into the three areas of Maindreieck, Mainviereck and Steigerwald with 23 large vineyards and 216 individual vineyards. In November 2011, the members of the Franconian Winegrowers' Association adopted a new regulation. The three old areas will be replaced by 12 much smaller ones. These will also replace the 23 large sites in the medium to long term. The old areas once played a role in the predominant marketing of Franconian table wine, which they had lost for some time. Before this conversion, the following description applied to the Maindreieck area:
By far the largest Franconian area Maindreieck is located in the centre of the wine growing region and comprises almost 4,200 hectares of vineyards. It is named after the landscape formed by the meandering course of the Main in the form of an upwardly open triangle between Schweinfurt, Ochsenfurt and Gemünden. Most of the vineyards extend along the large V-shaped loop of the Main. The section of the Tauber valley between Klingen and Tauberrettersheim, as well as the area of the Franconian Saale, 30 kilometres from the Main, are also included. A special feature is the "wine island" with Sommerach and Nordheim, created by human influence. As soil type shell limestone predominates. The most common varieties are Müller-Thurgau, Silvaner, Bacchus and Riesling. The area is divided into the 12 major sites Burg, Engelsberg, Ewig Leben, Hofrat, Honigberg, Kirchberg, Marienberg, Margrave Babenberg, Ölspiel, Ravensburg, Roßtal and Teufelstor.