Il mondo della Luna comprises a be farce in which the old fool and amateur astronomer Buonafede, who opposes the marriages of his daughters and his maid to their respective boyfriends, is tricked by one of the boyfriends, Ecclitico, into thinking that there is life on the moon.
The role of Ecclitico is particularly well played by Bernard Richter, who displays considerable range as both singer and actor here, providing some of the opera's funniest physical comedy while carrying the bulk of narrative.
An astronomer, Ecclitico
, his friend, Ernesto, and his valet, Cecco, are in love, respectively, with the two daughters, Clarice and Flaminia, and the chambermaid, Lisetta, of a wealthy dilettante, Buonafede.
Softened up before the astral voyage by watching maids disrobe through a fake telescope and a stultifying potion, Buonofede eventually agrees to the triple marriage--his daughters Flaminia and Clarice to Ernesto and Ecclitico
respectively, and his maid Lisetta to Cecco.