La Basoche is an opéra comique in three acts, with music by André Messager and words by Albert Carré. The opera is set in Paris in 1514 and depicts the complications that arise when the elected "king" of the student guild, the Basoche, is mistaken for King Louis XII of France.
The opera was first performed at the Opéra-Comique in Paris in 1890. Productions soon followed in continental Europe, Britain and the US. After that, the piece was revived repeatedly in France and elsewhere well into the 20th century.