Greek Mythology
The content of Greek mythology is not a simple matter.
There is an endless series of narratives from different eras and with different origins, for which great efforts have been made to locate, classify, cross-reference and compare them with parallel myths, historical narratives and events, so as to put together the texts as a whole.
However strange it might seem, a Greek myth is not quite a fairy tale. It represents some distant eras, fills in historical gaps and, above all, is a measure of cultural standards.