I have always loved a Celtic symbol I only know in my heritage as the Trinity knot. It is also a symbol I have wanted to have as a tattoo on my arm or some place interesting. Today I found out some of the meanings of this symbol.
The triquetra is a tripartite design comprised of three interlocked vesicae piscis made up of three interlocking semi-circles. It can be found alone, inscribed within a circle, or more often as in a logo, intersected by a circle within the design.
It has been found on rune stones in Northern Europe and on early Germanic coins. It presumably had a pagan religious meaning, and it bears a resemblance to the Valknut, a symbol associated with the Norse god Odin. It is interesting to note that the ancient Goths a Germanic ethnic group used this symbol. The triquetra later became widely used, in varying but similar forms, by the Medieval Celtic peoples.
Historically, this symbol has been most commonly used in the Christian church as a symbol of the Holy Trinity: Father, Son, and Holy Spirit. This appropriation was particularly easy because the triquetra conveniently incorporated three shapes, each of which was interpreted as the Christian Ιχθυς symbol (ichthus, meaning “fish”).
In Wiccan and Neo-pagan beliefs, the triquetra symbolizes the triple goddess (maid, mother, and crone) or one of the triple goddesses, for example, The Morrigan. The triquetra can also represent the three basic parts of a human being: mind, body, and soul. The ancient Celts used it to stand for the three domains of earth according to their legends–earth, sea, and sky.
The triquetra also appears in the U.S. television series Charmed, probably as a less threatening alternative to the pentacle (five-pointed star, the preferred emblem of witches, real and imaginary). In the series, the triquetra represents the “power of three, acting as one,” which in turn represents the three sisters.
So, let’s reclaim the symbol as a Christian one and at the same time using it as a bridge point between historic Christianity and modern Wiccan\Neo-pagan beliefs, and possibly even as a way of recalling the ancient Goths.
Source: Wikipedia entry for “triquetra.”