"The Nine Sovereigns at Windsor", all present on May 20, 1910 for the funeral of King Edward VII. It represents one of the largest gatherings of European royalty in that period of history.
Standing, from left to right: King Haakon VII of Norway, Tsar Ferdinand of Bulgaria, King Manuel II of Portugal, Kaiser Wilhelm II of the German Empire, King George I of Greece and King Albert I of Belgium. Seated, from left to right: King Alfonso XIII of Spain, King-Emperor George V of the United Kingdom and King Frederick VIII of Denmark.
Photographer: W. & D. Downey. Date taken: May 20, 1910 - Location taken: Windsor, England Source: Wikimedia Commons - Public Domain.