Il ritorno d'Ulisse in patria is an opera consisting of a prologue and five acts, set by Claudio Monteverdi to a libretto by Giacomo Badoaro. The opera was first performed at the Teatro Santi Giovanni e Paolo in Venice during the 1639–1640 carnival season. The story, taken from the second half of Homer's Odyssey, tells how constancy and virtue are ultimately rewarded, treachery and deception overcome. After his long journey home from the Trojan Wars Ulisse, king of Ithaca, finally returns to his kingdom where he finds that a trio of villainous suitors are importuning his faithful queen, Penelope. With the assistance of the gods, his son Telemaco and a staunch friend Eumete, Ulisse vanquishes the suitors and recovers his kingdom.

Claudio Giovanni Antonio Monteverdi was an Italian composer, choirmaster and string player. A composer of both secular and sacred music, and a pioneer in the development of opera, he is considered a crucial transitional figure between the Renaissance and Baroque periods of music history.