The Ancient Theatre of Mytilene is a historical site located on the island of Lesbos in Greece. Built in the 4th century BCE, it was used for various performances, including plays and musical events. The theatre could accommodate around 5,000 spectators and features a semi-circular seating arrangement, which is typical of ancient Greek theatres. Today, the ruins of the theatre are a significant archaeological site, showcasing the architectural style of the time. Visitors can explore the remnants of the stage and seating areas, providing insight into the cultural life of ancient Mytilene and its importance in the region.