Theater is a diverse and complex art. It requires collaboration among many artists, craftspeople, and managers in order to create a performance for audiences. Since the time of the ancient Greeks, theatrical events have included such production elements as costumes, scenery, properties, music, and choreography. Lighting and sound are more recent additions. Each element in today’s theater has its own designer, composer, or choreographer, who collaborates with the director to focus the audience’s attention on the actor in the special environment or seeing place.