Pabst Brewing Company is an American brewing company based in San Antonio, Texas. It was founded in 1844 in Milwaukee, Wisconsin, by Jacob Best and later named after Frederick Pabst, who expanded the company significantly during the late 19th century. The company became one of the largest brewers in the United States by the turn of the 20th century. It oversees a diverse portfolio of legacy American beer brands, including its flagship Pabst Blue Ribbon, Schlitz, Old Milwaukee, and Lone Star.