This entitled him to the style of Royal Highness from birth , as well as the right to be seated in an armchair in the king 's presence .
As the grandson of King Louis XIII of France , Philippe was a petit - fils de France .
This entitled Philippe to the style of Royal Highness from birth , as well as the right to be seated in an armchair in the king 's presence .
As the grandson of King Louis XIII of France , Philippe was a petit - fils de France .