The Hofbräuhaus am Platzl, Munich's famous "hofbrauhaus", was founded in 1589 by the Duke of Bavaria, Wilhelm V. It is one of Munich's oldest beer halls. It was originally founded as the brewery to the old Royal Residence, which at that time was situated just around the corner from where the beer hall stands today. The beer quickly became quite popular thanks to the first brewer, Heimeran Pongratz, and the famous "Bavarian Beer Purity Law" of 1516 that stated that only natural ingredients could be used in the brewing process.