Located in southern California, Los Angeles is the second largest city in the US with around 4 million people. Founded in 1781, LA saw growth in the early 20th century from the motion picture and aircraft industries, with Hollywood becoming the center of film production. By the 1920s and 1930s, LA had developed the largest motion picture industry in the world, producing around 400 films per year during Hollywood's Golden Age. Major landmarks like the Dolby Theatre, the Hollywood Walk of Fame, and Grauman's Chinese Theatre celebrate LA's legacy in the film industry.