It is the temple of Hephaestus, the best temple in Greece today. "The Temple of Hephaestus is a well-preserved ancient Greek temple dedicated to the ancient Greek mythology of the Vulcan and the goddess Hephaestus, located in the ancient city of Athens (Agora) On the northwest side, the summit of Agoraios Kolonos. From the 7th century to 1834, it was the St. George's Church of the Greek Orthodox Church. On February 2, 1833, during the celebration of the arrival of the first Greek King Otto I, the last mass was held. In 1834, Otto I ordered it to be converted into a museum until 1934, reverting to an ancient monument and conducting extensive archaeological research."