Geisenheim's Iron-Red Grosse Lage Above the Rhine

Rothenberg

The Rothenberg sits on the slope descending toward Geisenheim in the western Rheingau, a short distance from the Rhine and from the Geisenheim research institute that has shaped modern German viticulture. It is one of several top sites within Geisenheim's boundaries, and it should not be confused with the separate Nackenheimer and Niersteiner Rothenberg of Rheinhessen. The name comes from the ground itself: soils stained red by iron oxide. Under the VDP classification, the Rothenberg is rated VDP.GROSSE LAGE, the top tier equivalent to grand cru, confirmed on the VDP vineyard listing, on the estate pages, and on the labels of the wines bottled from it.

Geography and microclimate

The Rothenberg is a broadly south-facing slope, described across sources as south, south-southeast and south-southwest, which gives it strong solar exposure through the growing season. Gradients reach up to roughly 40 percent in the steeper sections. Elevation figures vary by source, running from about 100 metres near the lower boundary to around 150 metres at the top. Its position near the Rhine, combined with the warm aspect and good water retention in the soil, creates conditions that favour late-season botrytis. That capacity for noble rot is central to the site's identity.

Geology

The defining feature is the iron-rich, coarse weathered rock that gives the vineyard its red cast. Documented components include slate and Taunus quartzite within the weathered material, and the soils are noted for good water-holding capacity. This combination of warm, stony ground and reliable moisture supply is what allows the site to ripen fruit fully while sustaining the vines through dry spells.

The wines

Rothenberg has long been prized for sweet Riesling. The site's affinity for botrytis produces Auslese and Eiswein in the noble-sweet register, and it has set German national must-weight records more than once since 2005, with one botrytis harvest reported at around 340 degrees Oechsle. Alongside the sweet wines, the Rothenberg produces dry Riesling with aging potential, bottled as Grosses Gewächs since the 2009 vintage. Warmer recent seasons have been cited as favourable for the dry style here, and the same ripening strength that drives the record must weights supports concentrated, age-worthy dry bottlings.

Producer

The estate most closely identified with the Rothenberg is Geheimrat J. Wegeler, whose Rheingau operation works 100 percent Riesling. Wegeler recognised the slope's potential in the 1980s, farming close to six hectares of steep parcels under a long-term lease before purchasing them in 2010. The VDP-classified core of the site is generally given as about 5.44 hectares, set within a larger Einzellage of roughly 44 hectares. Wegeler bottles the site across styles, from the dry Grosses Gewächs to Auslese and Eiswein.

History

The Rothenberg was first documented as a single site in 1145. On the 1867 Prussian classification map of the Rheingau, one of the oldest surviving vineyard classification maps, it was ranked in the first class, placed alongside the Rüdesheimer Berg sites, Schloss Johannisberg, Steinberg, Marcobrunn and Gräfenberg. That historical standing, earned before modern warming, aligns with its current VDP.GROSSE LAGE status and marks the Rothenberg as one of Geisenheim's enduring great sites.

This comprehensive guide is part of the WineSaint Wine Region Guide collection. Last updated: September 2026.