The Abtserde is a tiny sub-plot of the Westhofener Brunnenhäuschen, where a vein of iron runs through the limestone. In the fourteenth century, the Abtserde was owned by the Kloster Schönau, and was considered the greatest vineyard in the Hügelland. The wine was reserved exclusively for the private needs of the abbot, who was also the Bishop of Worms.
Klaus and Hedwig Keller, (Klus-Peter's parents) purchased this 2.5 hectare parcel of the Abtserde in 2001, despite the land still being under lease for ten years. Keller's Abtserde Großes Gewächs has already been hailed as the greatest dry Riesling produced in Germany.