Celtic Cross Temporary Tattoo According to legend, it was Saint Patrick or possibly another saint who introduced the Celtic Christian cross to Ireland, and by extension, the world. This temporary tattoo shows the beautiful intricacies of a Celtic cross with markings on the body of the cross. A circle frames the intersection of the cross, symbolizing eternity. Wear this temporary tattoo to ensure you're sporting a touch of green on St. Patrick's Day. Show your love for all things Irish by wearing this tattoo anytime of the year. Does your family have Irish roots? Put that on proud display by wearing this temporary tattoo.