"Pandora's Box" (1904) (Die Büchse der Pandora) is a play by the German dramatist Frank Wedekind. It forms the second part of his pairing of 'Lulu' plays (the first is "Earth Spirit" [1895]), both of which depict a society "riven by the demands of lust and greed." G. W. Pabst directed a silent film version loosely based on the play in 1929. Both plays together also formed the basis for the opera "Lulu," by Alban Berg, which premiered posthumously in 1937. In the original manuscript, dating from 1894, the 'Lulu' drama was in five acts and subtitled 'A Monster Tragedy'. Wedekind subsequently divided the work into two plays. It is now customary in theatre performances to run the two plays together, in abridged form, under the title "Lulu." Wedekind is known to have taken his inspiration from at least two sources: the pantomime "Lulu" by Félicien Champsaur, which he saw in Paris in the early 1890s, and the sex murders of Jack the Ripper in London in 1888.