This is a representation of two people’s love, expressed by intertwined knots. These knots are exchanged by lovers in the same way that rings are exchanged nowadays. The simplest of all Celtic love knots is the Celtic Oval knot. The knots were first invented by the early Scottish, Welsh, and Irish Celts around 2500 BCE, and they represent perpetual life.
There are numerous other Celtic knots, each with its own function—after all, these knots represent an entire civilisation.