"The sun and moon at the top are present despite the Council of Constantinople prohibition of such symbology for its reference to other religions."
http://en.wikipedia.org/wiki/Matriarchal_religion
Cybrarian's note, chances are the sun and moon at the top represent all day and all night. Christianity is a relatively recent development and Christian Churches have been built over older temples and religions. I picture it like whilst the men were out hunting the women were back home decorating the cave. Mothers come from way, way, way back. Husband is a relatively recent innovation.
http://www.huffingtonpost.com/2013/10/13/cave-artists-women-study_n_4086385.html?ref=topbar
