. The law has since been repealed but many German beers, for marketing purposes, continue to declare that they abide by the rule, to reassure customers that only the three permissible ingredients are used. The law originated in the city of Ingolstadt in the duchy of Bavaria on 23 April 1516, although first put forward in 1487, concerning standards for the sale and composition of beer. The text In the original text, the only ingredients that could be used in the production of beer were water, bar… (More on Reinheitsgebot)