Θησείο is a historic neighborhood in Athens, Greece, known for its rich archaeological significance and vibrant atmosphere. It is named after the ancient Theseus, a legendary hero of Greek mythology. The area features the well-preserved Temple of Hephaestus, which dates back to the 5th century BC and is one of the best examples of ancient Greek architecture. Today, Θησείο is a popular destination for both locals and tourists, offering a mix of cafes, restaurants, and shops. The neighborhood is also home to the Thissio metro station, providing easy access to other parts of Athens and making it a convenient spot for exploring the city's cultural heritage.