'Harmony' Celtic Knot Stepping StoneCeltic Knot designs date back as far as 500 BC, and flourished during the Late Roman Empire in Celtic cultures, around 300 and 400 AD. Our beautiful Celtic Knot Stepping Stones display traditional quaternary knot designs. They are inspired by the beauty of the natural world and provide the illusion of woven strands with no beginning or end. The single, interlaced pattern of this knot symbolizes the interconnectedness of all things, and harmony between