Can you imagine how PISSED OFF the Germans were, when they tried to enforce this law!

Reinheitsgebot (German Purity Law) adopted in 1516, the oldest provision still enforced to protect the consumer:

"Furthermore, we wish to emphasize that in future in all cities, markets and in the country, the only ingredients used for the brewing of beer must be Barley, Hops and Water. Whosoever knowingly disregards or transgresses upon this ordinance, shall be punished by the Court authorities' confiscating such barrels of beer, without fail."