13:1 · This sign is found on many neolithic rock carvings. It is a variation of the sign called fylfot in English. It is called so because it was formerly used in Britain to fill the foots of coloured windows.
    It is also called gammadion and swastika.
    This variation has been found, among other places, on a runic stone in Lund, Sweden.
    For more facts about the swastika, turn to in Group 15.