The Knights Templar were those who devised and created the Game of the Oca (Goose), as a initiatory symbol of knowledge. This order of warrior monks were born with the purpose of guarding and protecting the pilgrims and it is exactly what is done in these boxes. Until their fall from grace, persecution and annihilation, the Templar order was a guardian of the way to Jerusalem. The Templars also took care of the safety of pilgrims to Santiago in the Middle Ages because many of its sections were located not in Christian dominions.
The game of Oca is an encrypted map of the Camino de Santiago, every step of the way corresponds to a square of the game, which begins and ends in Finisterre Roncesvalles.  The Templars marked the places that had a meaning for them and unfortunately with time and neglect some have been blurred, but we know that the monks have left guides stones, bridges, prisons, wells, cemeteries, places that are marked in the game.  Although references of that were not preserved, we do understand that the illustrations make a hieroglyphic known throughout the Order.  It was this knowledge that allowed all the knights of the Order, regardless of the language spoken to understand and recognize the symbols along the way.