Commedia dell'arte is a form of Italian theatrical performance that originated in the 16th century. It is characterized by its use of stock characters, improvisation, and physical comedy. Performers often wore masks and costumes that represented specific roles, such as Harlequin, Columbina, and Pantalone, each with distinct traits and behaviors. The performances typically took place in public spaces and involved a mix of scripted scenarios and spontaneous dialogue. This style of theater influenced many later forms of comedy and drama, contributing to the development of modern theater and improvisational comedy.