Ancient Greek theatre began as part of religious rituals to honor Dionysus. Plays were performed only at the annual City Dionysia festival in Athens and were later spread to allies to promote relations. Originally, all acting, directing, and writing roles were performed by a single person and only three male actors were allowed per play. The chorus was an important part of plays and accompanied dialogue with music. The three original genres were comedy, tragedy, and satyr plays. Theatre architecture included the orchestra, skene building, and later developed masks and costumes to enhance performances for large audiences.