In every culture, or religion, there are numbers considered to have special meaning. For instance, in Celtic tradition, you see the number three, and its multiples, represented in many different ways.
The most important multiple of three was nine, which is the natural result of three-times-three.
Nine is a number that always returns to itself.
To test this for yourself, multiply any number by nine.
9 x 3 = 27
Add the sum (2 and 7) together : 2 + 7 and you’ve returned to 9
620 x 9 = 5580
5 + 5 + 8 + 0 = 18
1 + 8 = 9
6958 x 9 = 62622
6 + 2 + 6 + 2 + 2 = 18
1 + 8 = 9
The Triquerta (or spelled Triquetra) or Trinity knot, is one of the best known Celtic symbols.
Interlaced triquetra : trefoil
Triquetra; from the Latin adjective triquetrus, three-cornered) denotes a particular complicated shape formed of three vesicae piscis (the leaf-like shape in between two equal diameter circles each centered on the circumference of the other), sometimes with an added circle in or around the three lobes.
Celtic Knot @ Pixabay