1. 
   Reinheitsgebot
   The Reinheitsgebot (De-Reinheitsgebot.ogg, literally "purity order"), sometimes called the "German Beer Purity Law" or the "Bavarian Purity Law" in English, was a regulation concerning the production of beer in Germany. In the original text, the only ingredients that could be used in the production...
   Found op http://en.wikipedia.org/wiki/Reinheitsgebot
   
   
2. 
   Reinheitsgebot
   The German Purity Law of 1516 that states the only 4 ingredients that can be included in beer are water, malted barley, yeast and hops.
   Found op http://www.brew-monkey.com/brewschool/glossary.php
   
   

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