King Leopold II of Belgium, King Alfonso XIII of Spain, President Félix Faure of France, President Adrien Lachenal of Switzerland, King Carlos I of Portugal, King Christian IX of Denmark.
Emperor Franz Joseph I of Austria-Hungary, King Oscar II of Sweden & Norway, Emperor Nicholas II of Russia, King Umberto I of Italy, Emperor Wilhelm II of Germany.
Sultan Abdul Hamid II of the Ottoman Empire, King George I of Greece, King Alexander I of Serbia, King Carol I of Romania, Prince Ferdinand I of Bulgaria, Prince Nicholas I of Montenegro.

1901-03

Sultan Abdul Hamid II of the Ottoman Empire, King Oscar II of Sweden & Norway, King George I of Greece, Emperor Wilhelm II of Germany, Emperor Nicholas II of Russia, King Victor Emanuel III of Italy, King Alfonso XIII of Spain.
Prince Albert I of Monaco, King Christian IX of Denmark, Grand Duke Adolf I of Luxembourg, Emperor Franz Joseph I of Austria-Hungary, Queen Wilhelmina of the Netherlands, King Edward VII of the United Kingdom, King Carol I of Romania, Prince Ferdinand I of Bulgaria, Prince Nikola I of Montenegro.
President Emile Loubet of France, Prince Johann II of Liechtenstein, King Leopold II of Belgium, King Carlos I of Portugal.

1903-05

King Leopold II of Belgium, King Alfonso XIII of Spain, President Émile Loubet of France, King Edward VII of the United Kingdom, King Carlos I of Portugal, King Christian IX of Denmark.
Emperor Franz Joseph I of Austria-Hungary, King Oscar II of Sweden & Norway, Emperor Nicholas II of Russia, King Victor Emanuel III of Italy, Emperor Wilhelm II of Germany.
Sultan Abdul Hamid II of the Ottoman Empire, King George I of Greece, King Peter I of Serbia, King Carol I of Romania, Prince Ferdinand I of Bulgaria, Prince Nicholas I of Montenegro.

1908

King Chulalongkorn of Siam, King George I of Greece, King Peter I of Serbia, King Carol I of Romania.
Emperor Franz Joseph I of Austria, King Ferdinand I of Bulgaria, Sultan Abdul Hamid II of the Ottoman Empire, King Victor Emanuel III of Italy.
Emperor Nicholas II of Russia, King Edward VII of the British Empire, Emperor Wilhelm II of Germany.
King Gustaf V of Sweden, King Haakon VII of Norway, King Frederik VIII of Denmark, Queen Wilhelmina of the Netherlands.
Emperor Guangxu of China, Emperor Mutsuhito of Japan, King Manuel II of Portugal, King Alfonso XIII of Spain.

1910

King Haakon VII of Norway, King Ferdinand I of Bulgaria, King Manuel II of Portugal, Emperor Wilhelm II of Germany, King George I of Greece, King Albert I of Belgium.
King Alfonso XIII of Spain, King George V of the United Kingdom, King Frederik VIII of Denmark.