Heiligenstein, the most famous vineyard in the Kamptal, is legendary for Riesling. The terraced south and southwest facing slope has a unique geological history and it's unusual that soil this old is at the surface of the earth. The outcropping bedrock consists of a reddish-brown sandstone with a high feldspar content, coarse conglomerates, and minor siltstone. These sediments formed approximately 250-280 million years ago under arid conditions, in lakes, ponds, and ephemeral rivers. The rocks contain fossilized plants and gravel with clasts of volcanic rhyolite. Loess is only preserved in a few locations, within shallow depressions.

For the Alte Reben, the grapes are from the oldest vines (alte = old and reben = vines) and naturally have a very low yield. The grapes are selected by hand and brought to the winery in small crates, then they are gently pressed and macerated cold for a few hours before being fermented spontaneously and matured on the fine lees in 1,000 liter wooden casks. The deep roots in the meager rock result in a very elegant, tightly woven, tension-filled riesling, which particularly shows the beauty of this special site and the vintage. Certified organic.