Symbolic images- Where can I find some online?!?

Well, your description of the ignment is very vague but if you just need an image that represents a culture, idealism, etc. then some things could be a crucifix which symbolizes Christianity. The pentagram signifies paganism. You can also use things like the symbol for astrological beings. Such as the symbol for Sagittarius, Virgo, and Cancer. The number 666 has symbolism to it as well. I hope I've steered you in the right direction.