Warner Brothers - Harry (1881-1958), Albert (1883-1967), Sam (1887-1927) and Jack (1892-1978), four brothers who founded Warner Bros. - the third-oldest American movie studio in continuous operation; their parents immigrated from Poland in search of a better future; the three elder brothers began in the exhibition business in 1903, having acquired a projector with which they showed films in the mining towns of Pennsylvania and Ohio; they opened their first theater, the Cascade, in New Castle, Pennsylvania in 1903; by the time of World War l they had begun producing films, and in 1918 the brothers opened the Warner Bros. Studio on Sunset Boulevard in Hollywood.From: "400 Years of Polish Immigrants in America 1608-2008" ed. by Mariusz M. Brymora, Washington, DC, 2008