Of the many intricate ornamental Celtic knots, the triquetra or trinity knot is perhaps the most popular due to its simplicity and rich symbolism.
There is no one particular symbolic meaning to the triquetra, because it holds a meaning that differs for each individual based on their personal beliefs.
A knot with no end and no beginning, with a triangular shape, the triquetra can be adopted to mean anything associated with the magical number three. It could mean past, present, future; Father, Son, Holy Ghost or Maiden, Mother Chrome, or anything one fancies. Traditionally, the triquetra diagram is accompanied by a circle around the knot which symbolizes eternity.