Question: When did Grand Duke Vyacheslav Konstantinovich Of Russia's mother die?
Sentence (from "Grand Duke Vyacheslav Konstantinovich of Russia"): Grand Duke Vyacheslav Konstantinovich of Russia, (13 July 1862 – 27 February 1879), was a Romanov grand duke and the youngest son of Grand Duke Konstantin Nikolayevich of Russia and his wife Princess Alexandra of Saxe-Altenburg.
Relevant evidence: Yes