November 27th1252:  Louis IX of France’s beloved mother, Blanche of Castile, dies.  On her deathbed she “takes the veil” wearing it over her crown. 

Blanche of Castile at her coronation

It will take months for the French King (who is on crusade and moving from place to place in the Holy Land) to hear of the Dowager Queen’s death.  Unlike Louis, Marguerite will not be saddened by the news.