A Celtic knot is a stylized representation of an endless knot used for decoration by the Celt.
There are several types of knots. One knot is known as the trinity. the trinity knot also known as the Triquetra is a continuous interweaving triple knot symbolism no beginning or ending.the Celt believe the number three was sacred such as the three stages of life,the three elements;earth,sky and sea and three stages of time being past present and future. later the Christians adopted the symbol to represent the holy trinity.in modern times the trinity knot is now interpreted as the Irish love knot.