Warsteiner beer is brewed in the Arnsberg Forest Nature Park outside of Warstein, North-Rhine Westphalia, Germany. Warsteiner has been a product of the Cramer family since 1753. Warsteiner is Germany's largest privately owned brewery; its most popular beer is 'Warsteiner Premium Verum'. Catharina Cramer (* 1978) is the owner of Warsteiner.Warsteiner ranks number 4 among Germany's best selling breweries.It is sponsoring competitive hot air ballooning in Germany.