The quarries are privately owned and located in the area of Dionyssos, Attica. The world famous “Dionyssos” marble is extracted here. The quarry operates since the end of the 19th century. More than 100 years. Since 1949 it is exclusively operated by “Dionyssos-Penteli Marble Quarries S.A.”. Nowadays, mining, apart from the ground mining fronts, takes also place in underground sites (following the methodology of rooms with support pillars). Both Dionyssos marble, which has the same chemical composition and texture as Pentelic marble, of Parthenon fame, and Kokkinara marble are among the most sought-after linings for large and smaller projects, not only in Greece, but all over the world.