celtic love knot, intertwined heart and triquetra, everlasting love knot. red logo icon valentines concept,

abstract ancient art background celt celtic concept culture day decoration design element emblem endless eternity everlasting folk forever geometric graphic heart heraldic icon illustration infinity intertwined intertwining isolated knot logo love medieval ornament pattern red religion religious shape sign simple strong style symbol symmetry tattoo traditional tribal trinity triquetra valentine valentines vector vintage white