Brewery Town, German American Beer, and the rise of lager. During this era breweries flourished in the Brewerytown and Kensington neighborhoods. In 1840, John Wagner brought the first sample of lager yeast from Bavaria to the United States and used it to brew the first American lager beers in what is now the Northern Liberties. This new beer was refreshing, spoiled less easily, and was lower in alcohol than the ales previously on the market. Most mass marketed beers today are lagers: Budweiser, Heineken, Miller, and Coors are all examples of lager beer.