They consider the red dragon as their most Welsh symbol, but along with the dragon they recognize the leek and the daffodil. When Christianity came to the Celtic lands of Britain and Ireland, the monks of the seventh century adapted the ancient Celtic art forms to the new religion. The Celtic cross and the Tree of Life, for example came from this marriage. Writing also came to the Celts for the first time. The most famous manuscript by the monks is the beautiful Book of Kells , on display in the library of Trinity College in Dublin.
Celtic knots are complete loops with no end or beginning.
Celtic animal interlace is similar in construction but the cords terminate in feet, heads, tails ect. Pure knots should always be unending, unless the loose end of a strand is stylized into a zoomorphic element or a spiral. The symbolism that has come down through the ages is as obscure and indirect as much of the speech and literature of the Celtic people. Knotwork's meaning defies literal translation and should be sought at a deeper level. The repeated crossing of the physical and the spiritual are expressed in the interlace of the knots.