Typically the placement of the cross intersection represents the destination of the spirit. Standard: up for heaven (Jesus ascended), Celtic: center (God with us), Satanic: down (hell). The Catholics ones are representing the crosses of martyrs. The Eastern Orthodox one with the third slanted bar represents the differing fates of those crucified with Jesus. Early crosses and swastikas represent God as creator and source of all things, with the circle and arms of the swastika representing the cycle of the seasons and progress. Cross, and wheel like symbols with six or twelve legs are referring to the zodiac as part of the seasonal cycles.