Here you can download a simple but elegant repeating pattern that, throughout history, has been used by other peoples, too, not just the Celts.
Its simple beauty has caused us to make a 3D model from it, which you can download here: Celtic Repeating 3D Pattern. The appearance of the pattern partly resembles an enlarged image of a fabric, i.e., intertwined threads of fabric. This is essentially not an accurate description because if you look closely, the whole pattern consists of identical circles with 3 strips emerging from circle center; the circles are properly spaced from each other, and the strips are drawn so that they look like they are intertwined. This Celtic repeating pattern got its name based on the information contained in the book in which it was found. Only some time later did we learn from a couple of other books that the pattern had also been used by some other peoples. If we put aside its history, one may easily conclude that it has kept its modern look, and that one may consider using it wherever a simple knot repeating pattern is required. It is also suitable for people involved in graphic design, and especially interesting for people involved in wood/stone carving.