Crann Bethadh, the Celtic Tree of Life, is much more than a single trunk borne of roots below and stretching to the heavens with branches above; it is the symbol of all of life on the planet, born of the earth and sustained by the power of the Universe. It is an intricate representation that links every root below to every branch above, depicting the network of natural bonds that links all Life together.
Triquetra
This symbol is also known as the trinity knot. It has been used to represent many different concepts throughout time. As far as symbolizing a trinity goes, it was used to represent mind, body and soul; past, present and future; life, death and rebirth; creation, preservation and destruction; as well as the Father, Son and Holy Ghost.
Celtic Cross
Some experts suggested that this even-armed Celtic cross represented the four stages of the day: morning, noon, evening and midnight while some considered it as a representation of earth, air, water and fire. It was ultimately adapted by Saint Patrick who decided to combine the Christian cross with the Celtic circle representing eternity.
Claddagh
Derived from the Irish term an cladach, the word Claddagh means “flat stony shore” and is the name of a fishing village in Galway, Ireland. The heart represents love while the clasping hands represent unity and promises, the crown represents loyalty and the heart in hands represents belonging and sacrifice meaning to say “I come to you with my whole heart”.
Awen
The symbol of three rays (sometimes interpreted as three flames), is a neo-Druid symbol. The two rays on the sides represent male and female energy while the one in the center represents the balance between them. The Awen was used as the symbol of unity and harmony of the opposites in the universe. Therefore, it could be
interpreted as “the Celtic yin-yang”
Triskelion
This symbol is comprised of three conjoined spirals with rotational symmetry. That is why it is also called “the triple spiral”. It represents triple nature and the movement of life which is formed of past, present and future. The triskelion was also a symbol of strength in Celtic culture since it represents the will to move forward overcoming adverse conditions that one might face.