Grand Duke Konstantin Nikolayevich of Russia was the Emperor's Viceroy of Poland from 1862 to 1863 and a general admiral of the Imperial Russian Navy.
Photograph, c. 1880
Olga Constantinovna of Russia was Queen of Greece as the wife of King George I. She was briefly the regent of Greece in 1920.
Grand Duke Konstantin Nikolayevich of Russia
…Grand Duke Nicholas Konstantinovich of Russia (1850–1918) Olga Konstantinovna, Queen of the Hellenes (1851–1926) Grand Duchess Vera Konstantinovna of Russia (1854–1912…
Olga of Greece VI restoration
Grand Duchess Olga Constantinovna, 1867
Queen Olga of Greece in a traditional Greek costume, c. 1874
Edition of Le Petit Journal celebrating the silver wedding anniversary of King George I and Queen Olga, 1892