Images of Pandora began to appear on Greek pottery as early as the 5th century BCE, although identification of the scene represented is sometimes ambiguous. An independent tradition that does not square with any of the Classical literary sources is in the visual repertory of Attic red-figure vase-painters, which sometimes supplements, sometimes ignores, the written testimony; in these representations the upper part of Pandora is visible rising from the earth, "a chthonic goddess like Gaia herself." Sometimes, but not always, she is labeled "Pandora". In some cases the figure of Pandora emerging from the earth is surrounded by figures carrying hammers in what has been suggested as a scene from a satyr play by Sophocles, "Pandora, or The Hammerers", of which only fragments remain. But there have also been alternative interpretations of such scenes.