The Marathon Municipal Theatre, known as ΔΗΘΕΜΑ, is a vibrant cultural hub located in Marathon, Greece. As a public legal entity, it serves the community by offering a dynamic array of theatrical performances and educational initiatives. The theatre features multiple stages, including the Central Stage, the Varnava Stage, and the New Makri Stage, showcasing a diverse range of productions, from classic plays to contemporary dramas.

Throughout the year, ΔΗΘΕΜΑ hosts various events, including the much-anticipated Summer Festival, which features a lineup of premieres and special performances. This season's highlights include notable shows such as "Women Exiled in Trikeri" and productions of Aristophanes' works. In addition to theatrical performances, the theatre is committed to fostering creativity through adult acting classes and competitions, such as the National Monologue Competition.

With a strong emphasis on community engagement and artistic expression, ΔΗΘΕΜΑ continues to enrich the cultural landscape of Marathon, making it a must-visit destination for theatre enthusiasts.