Popularized again in modern times, the Celtic Cross is said to be symbolic of the “cross” on which Jesus Christ was nailed, but the hebrew word was timber (xylon) or stake (stauros) later translated as cross, from the norse (japhetic) word root kros which was the name of the sun symbol, the wheel cross of Odin and Taranis, symbolic of the seasons, the sun, and fertility, also the basic structure of the device used to measure and map the earth, having birthed the word geometry meaning earth measure.
