The Badische Staatsbrauerei Rothaus (Rothaus, State Brewery of Baden) is a brewery located 1000 m (3300 ft.) above sea level in the town of Rothaus in Germany's Black Forest, in the vicinity of Grafenhausen and the Schluchsee. It is one of the most successful and profitable regional breweries, and in the past decade has become well-known outside of Baden as well. The most successful product, a Pilsner-style beer, "Rothaus Tannenzäpfle" or simply "Zäpfle", comes filled in 33 cl. bottles.
The brewery was founded in 1791 by the Abbot of St. Blasien as a measure to encourage economic growth in the Black Forest. Through secularization, the cloister eventually changed ownership in 1806 to the Grand Duchy of Baden. The name "Rothaus, State Brewery of Baden" has been in use since the abolition of the monarchy in 1918, and its name still remains to this day although the brewery is now in the full ownership of the Bundesland Baden-Württemberg.
The brand "Tannenzäpfle" is, as of 2006[update] celebrating its 50th year of existence with a fiftieth anniversary edition of the original 1956 label design.