The beer brand commonly known as “The King of Beers” is Budweiser.
Budweiser is an American-style pale lager introduced in St. Louis in 1876. It was developed by Adolphus Busch and Carl Conrad as a lager inspired by brewing traditions associated with Budweis, now České Budějovice in the Czech Republic. The beer is produced by Anheuser-Busch, now part of AB InBev.
“The King of Beers” is a marketing slogan, not a formal beer classification. The phrase was adapted from the older description “The Beer of Kings,” associated with beer from Budweis. Budweiser’s advertising made the newer slogan widely recognizable, particularly in the United States.
A common source of confusion is that “Budweiser” can refer to different beers in different markets. Anheuser-Busch has faced long-running trademark disputes with Czech brewer Budweiser Budvar. In much of the European Union, the American product is sold as “Bud,” while both brands may use the Budweiser name in some countries.