50 Riesling is under the watchful care of the master house of Riesling, Schloss Johannisberg. Schloss Johannisberg has been the pioneer in the Riesling category for nearly 1200 years. They were the first winery to create a monopoly of 100% Riesling production, the first to discover Spatlese in 1775, the first to use the term Auslese in 1787, the first to attempt to define various predicate levels and the first to create Eiswein in 1858.