Passion Play in the context of Fond du Lac, Wisconsin

Harlequin (/ˈhɑːrləkwɪn/, Italian: Arlecchino, Italian: [arlekˈkiːno]; Lombard: Arlechin, Lombard: [arleˈki]) is the best-known of the comic servant characters (Zanni) from the Italian commedia dell'arte, associated with the city of Bergamo. The role is traditionally believed to have been introduced by the Italian actor-manager Zan Ganassa in the late 16th century, was definitively popularized by the Italian actor Tristano Martinelli in Paris in 1584–1585, and became a stock character after Martinelli's death in 1630.

The Harlequin is characterised by his checkered costume. His role is that of a light-hearted, nimble, and astute servant, often acting to thwart the plans of his master, and pursuing his own love interest, Columbine, with wit and resourcefulness, often competing with the sterner and melancholic Pierrot. He later develops into a prototype of the romantic hero. Harlequin inherits his physical agility and his trickster qualities, as well as his name, from a mischievous "devil" character in medieval Passion Plays.

In Christian music, a Passion is a setting of the Passion of Christ. Liturgically, most Passions were intended to be performed as part of church services in the Holy Week.

Passion settings developed from medieval intoned readings of the Gospel texts relating Christ's Passion, to which later polyphonic settings were added. Passion Plays, another tradition that originated in the Middle Ages, could be provided with music such as hymns, contributing to Passion as a genre in music.