The winegrowers' association in the German wine-growing region of Rheingau was founded in 1984 by Bernhard Breuer (1947-2004) with the aim of protecting the classic Rheingau Riesling. At last count, about 50 wineries were members. In the course of time, membership and objectives increasingly overlapped with the VDP Rheingau, as a result of which Charta Rheingau was absorbed into it in March 1999. However, the Charta wines continue to be produced by some wineries according to almost the same specifications. The dry to semi-dry wines must be made from 100% Riesling from the best Rheingau vineyards. Within the four-level VDP quality pyramid, this corresponds to the Erste Lage or Grosse Lage. Confusingly, however, the site may not be listed on the front label, but only on the back label. Compared to the legal requirements, the wines must have a must weight eight °Oe higher.