Dr Loosen produces nothing but Riesling, from traditional slate soil vineyards in Mosel Valley. A full range of Prädikat wines is made from six stellar vineyards. The sites owe their excellent quality to three major factors, exceptional regional climate, the mineral rich slate and volcanic soils, and the incredible age of the estate's ungrafted Riesling vines. These elements are the building blocks of each vineyard's terroir and have long been recognized for their importance in producing outstanding wines. All of Dr. Loosen's six major sites were designated as Erste Lage, equivalent to Grand Cru, in the 1868 Prussian classification of Mosel vineyards which predates the system in Burgundy.