In Germanic countries this structure
is called St. Hans' cross or the cross of St John. In Scandinavia it is a
magic ideogram from the Viking era, or even older. It seems also to
have been used in Cabbalistic mysticism. Today, it is used as a
cartographic and traffic sign to denote ancient remains or an ancient
maps and are sometimes used as
As a traffic sign it is inserted in a square denoting the ground: .
Compare with for prehistoric site, and with in Group 27.
also appears in pre-Columbian America, where it is associated with .