"Not one but two kings of France perished by smashing their heads on the top part of a door, or lintel.
Charles VIII in 1498 (the shock probably caused something else but still).
Louis III was pursuing a fair lady (who was actually trying to escape him) on his horse on August 5, 882, when she passed a door. The horse went through, but not the king, who broke his skull and died instantly."
All this was loooong before 'we' became a kingdom in it's current form