Klaus Peter Keller is the most famous practitioner of dry German Rieslings and he’s from the Rheinhessen. More importantly, Keller currently works vineyards in the Rheinhessen. It’s funny: sites that were, only a short time ago, all but unknown to the general public (Abtserde, Kirchspiel, Morstein, etc.) are now mentioned with reverence and awe. For the wines of the Rheinhessen, the key is limestone. This is what gives the wines their glycerin-induced sexiness.