Sovereigns of Europe
date: cca. 1867
posted on Facebook by Mr. Alexandru Ursu-Bukowina
no copyright infringement intended
top row, from left to right:
King Christian IX of Denmark, King William I of Prussia (Emperor of Germany from 1871), Emperor Napoleon III of France, Czar Alexander II of Russia, Sultan Abdülaziz of Turkey.
second row top to bottom, from left to right:
King Charles XV