Medicine Wheel. It represents the circle of life. The center cross bar symbolizes the four winds, four seasons, four directions and four teachers. It is considered to be good luck by the Native Americans. Many Natives display it in their homes for protection.
The Witch’s knot is a common symbol in folk magic. The witch’s knot is a symbolic representation of the knot magic practiced by witches in the middle ages, and was used as a sympathetic charm against witchcraft, and usually scratched over doorways of homes and stables. One aspect of its efficacy as a protective charm lay in the ability to draw the complicated symbol in one continuous motion. (symboldictionary.net)
How to Make a Brighid Wheel/Cross In Celtic mythology the cross is not actually a cross, it is a wheel of fire. The wheel was placed in the home to protect the home from fire and evil. Brighid is also known as a goddess of the crossroads, and this symbol represents the place where two worlds meet, and the year is at a crossroads between light and dark.