The triquetra is a symbol composed of 3 interlocked fish marking the intersection of 3 circles. It is a symbol of the Holy Trinity (Father, Son, and Holy Spirit). EDIT (by separate individual): This...
The triquetra symbolises many things. With the ancient Celts it represents the the stages of a woman. Maiden-Mother-Wise womanthe first being the maiden - in your early years to pubertythe second...