Posada's most famous works are calaveras, or skeleton images, including "La Calavera de la Catrina" which satirized the upper classes of Porfirio Díaz's time. Most of his imagery had religious or satirical meanings. Since his death, his images have become associated with Día de los Muertos, or Day of the Dead. Largely forgotten in his lifetime, Posada's engravings were brought to wider audiences in the 1920s by French artist Jean Charlot. While Posada died in poverty, his calaveras are now well known examples of Mexican folk art and influenced the muralist José Clemente Orozco.