The funeral of Grand Duke Jean of Luxembourg was attended by representatives from nearly every European royal house, many who wore hats. Out of respect for this event and the Grand Duke’s memory, this post contains photos only (no commentary) and is not open for comments.
Monarchs from Denmark, Sweden, Liechtenstein and Norway:
Spanish, Romanian and Greek Queens:
Dutch, British and Norwegian Royals:
Spanish, Italian, Bulgarian and Portuguese Princesses
Jordanian and Moroccan Royals:
Marlene Koenig, author of Royal Musings, published a full guest list here. Representatives from numerous abolished, lesser known European monarchies (mostly French, German and Prussian) were in attendance but have not been included here- you can see them at this comprehensive post over at Luxarazzi.
Photos from Getty as indicated