The brewery is built upon a complex of natural caves which were once used for the lagering of beer by early German brewers.

In addition to being used for the storage and lagering of beer, such naturally cool places were sometimes employed as beer gardens, places for entertainment.

The combination brighter malt prepared by English technology, Pilsen's remarkably soft water, local Saaz noble hops from nearby Žatec and Bavarian-style lagering produced a clear, golden beer that was regarded as a sensation.