(sometimes known as a pentalpha
or a star pentagon
) is the shape of afive-pointed stardrawn with five straight strokes.
Pentagrams were used as an important religious symbol by theBabyloniansand by thePythagoreansinancient Greece. Pentagrams are used today as a symbol of faith by manyNeopagans, and may be found in jewelry incorporating the symbol. Several faiths also associate the pentagram withmagic.Christiansin the past commonly used the pentagram to represent thefive wounds of Jesus,and it has associations withFreemasonry.
There is a deeper history there but that is kind of the gist of it.