A Celtic Valentine or lovers knot, the heart shape as we know it emerged as a symbol of love in the middle ages. Rendered in Celtic knotwork, the Celtic heart is an woven endless path representing eternal love.

Celtic knotwork symbolism has many messages. It may be a lover's knot, a reminder of life's meandering quest or an emblem of a person's Celtic heritage. The repeated crossings of the knot can represent the weaving of the physical and spiritual paths and the eternal continuum of life, love and faith. Hearts are traditional in late medieval Scottish and Irish decorative art. About 1990 Walker and a number of other Celtic designers spontaneously and independently incorporated the heart into the knotwork tradition of Celtic art. The popularity of the Claddagh ring (heart, crown and hands) has made this design equally popular with men and women.