What is a ten penny opera?

"The Threepenny Opera" (originally "Die Dreigroschenoper") is a musical play by Bertolt Brecht with music by Kurt Weill, first performed in 1928. It is a satirical adaptation of John Gay's "The Beggar's Opera," set in a corrupt, capitalist society. The story follows the antihero Macheath and explores themes of morality, class struggle, and social injustice. The work is known for its innovative blend of music, drama, and political commentary.