Prince Oleg Konstantinovich was the fourth son of Grand Duke Konstantin Konstantinovich (KR), born 27 November 1892 (N.S.).
In 1913 he graduated from school and was enrolled as cornet in the Hussars. From the first days of the war he served in the army in East Prussia.
On September 27, 1914, in a battle near the village of Pilvishki, he was mortally wounded, and died in a hospital in Vilna two days later.
For bravery in combat, he was posthumously awarded the Order of St. George 4th Class.
A memorial to Oleg Konstantinovich was opened on 29 September, 2015 in Tsarskoe Selo, on the 101st anniversary of his death.
From the 1914 diary of Tatiana Romanov:
“Monday, 29 September… Oleg was wounded yesterday and tonight he died in Vilna…” “Tuesday, 30 September… In the afternoon went to Strelna for Oleg’s panikhida. Had tea with them. Went to church here.”
From the diary of Dowager Empress Maria Feodorovna:
“September 29, 1914 – Monday: Yesterday evening poor little Oleg died. He managed entirely to see his unhappy parents for a while and make his confession to a priest. What horrible grief! Right after lunch we went off to Strelna to panikhida and a wake at the home of Olga, Mitya, and Tatiana, who are suffering deeply. Nicky was also there with his family. After the panikhida we had tea …”
Video from the memorial opening: