Theatre is a collaborative art form that uses live performers to present an experience to an audience. It can refer to the performance itself, the building, or plays. Key collaborators include producers, directors, actors, designers, builders, crews, and playwrights. Theatre originated in ancient Greece where festivals honored Dionysus and plays were performed in outdoor theatres. Major forms included tragedy, comedy, and satyr plays. Theatre continued to develop under the Romans, influenced by Greek culture. Roman theatres staged a variety of performances and plays by authors like Plautus and Seneca.