The question was brought up on another thread as to what the symbol that is found in a NKJV is by another poster. Some say it represents the Holy Trinity, and Wikipedia agrees with this. However, after researching other sites, I find it was used on Led Zeppelin albums, it is used on tarot cards, and in the wiccan religion, it is used to represent a trinity, but not the Holy Trinity. The wiccan religion affirms that it represents this trinity: The Triple Celtic Goddess'of Maiden, Mother, and Crone which symbolizes Power, Protection, and Positive energy. Information here: Ancient Celtic Symbol Wikipedia says it was a religious symbol of the trinity since before the crucifixion. If one does a search on google for the word 'triquestra' one can find much concerning this mystic symbol.