Both Zunft Kölsch and Erzquell Pils originate from the copper kettles of the Erzquell Brewery in Wiehl-Bielstein. The beer develops its characteristic flavour from the raw materials of water, malt and hops, with yeast added to the mix in huge fermentation tanks. 

In 1900, Ernst Kind saw more of a future in brewing than in the spinning mill he had operated until then, so he founded the Adler Brewery in Wiehl-Bielstein. Thanks to his technical skills and business acumen, the brewery acquires an excellent reputation, and sales of his beers in the ever-expanding market continue to grow. In 1976, the name was changed to Erzquell Brewery. The ownership structure remains unchanged. The brewery is in its fourth generation of family ownership. The sparkling copper kettles have almost become a landmark of Bielstein, the beer village.