Tetragrammaton

The Tetragrammaton is an ancient amulet, which was very popular during the Middle Ages; it can still be found nowadays in one of Westminster Abbey's windows. There are many variations of this symbol. The most usual one has four Hebrew letters inscribed in a circle with a pentagram (five-pointed star). The Hebrew letters literally translate to YAHWEH (God, in Hebrew). The amulet is a physical and spiritual protector of health and safety.