The myth of Pandora is ancient, and there are several different Greek versions. It has been interpreted in different ways. In the literary versions, the myth is a kind of theodicy, it addresses the question why there is evil in the world. The oldest versiion is that of Hesiod, who wrote it in the 7th century BC. He shortly mentions it in his Theogony, in line 570, but does not name Pandora. In his Works and Days he gives the oldest known literary version of the story. There is an older story that tells that urns and jars can contain blessings and evils which is told in Homer's Illiad: