Argentine cinema history began in Buenos Aires with the first film exhibition on 18 July 1896 at the Teatro Odeón. With his 1897 film, ''La bandera Argentina'', Eugène Py became one of the first filmmakers of the country; the film features a waving Argentine flag located at Plaza de Mayo. In the early 20th century, the first movie theaters of the country opened in Buenos Aires, and newsreels appeared, most notably ''El Viaje de Campos Salles a Buenos Aires''. The real industry emerged with the advent of sound films, the first one being ''Muñequitas porteñas'' (1931). The newly founded Argentina Sono Film released ''¡Tango!'' in 1933, the first integral sound production in the country. During the 1930s and the 1940s (commonly referred as the "Golden Age" of Argentine cinema), many films revolved around the city of Buenos Aires and tango culture, reflected in titles such as ''La vida es un tango'', ''El alma del bandoneón'', ''Adiós Buenos Aires'', ''El Cantor de Buenos Aires'' and ''Buenos Aires canta''. Argentine films were exported across Latin America, specially Libertad Lamarque's melodramas, and the comedies of Luis Sandrini and Niní Marshall. The popularity of local cinema in the Spanish-speaking world played a key role in the massification of tango music. Carlos Gardel, an iconic figure of tango and Buenos Aires, became an international star by starring in several films during that era.