The (literally "purity order"), sometimes called the "German Beer Purity Law" or the "Bavarian Purity Law" in English, is a regulation that originated in the city of Ingolstadt in the duchy of Bavaria on April 23, 1516, although first put forward in 1487, concerning standards for the sale and composition of beer. Before its official repeal in 1987, it was the oldest food quality regulation in the world. The vast majority of continue to comply to this regulation and use this in their marketing ap… (More on Reinheitsgebot)