Here the ancient Russian and Slavic mythology. Search the internet, if you're interested. I can not through an interpreter to explain to you in detail. There is also Celtic mythology there!
The work represents the time when the goddess Morgana conceived plunge the whole world in darkness and gloom which had prevailed throughout the year. Morgana was angry. She wanted to kill the sun god, to have died all life on earth and eternal darkness came. And then resurrected the ancient gods, that was the last battle for all life on earth.But God's sun is not able to save completely. And it is believed that he was dying each year, and winter comes .... When resurrected, then comes the spring. The ancient people prayed all winter, that God is risen, bringing with it new life and fertility.
Description and full size here http://josefinacs.deviantart.com/art/Morgana-272596897?q=gallery%3Ajosefinacs&qo=2&offset=25#comments