| Grand Duke Nicholas Constantinovich | |
| Spouse: | Nadezhda Alexandrovna Dreyer |
| Issue: | Prince Artemy Nikolayevich Romanovsky-Iskander Prince Aleksandr Nikolayevich Romanovsky-Iskander |
| House: | Holstein-Gottorp-Romanov |
| Father: | Grand Duke Constantine Nikolaevich of Russia |
| Mother: | Princess Alexandra of Saxe-Altenburg |
| Birth Date: | 14 February 1850 |
| Birth Place: | Saint Petersburg, Russian Empire |
| Death Place: | Tashkent, Russian Turkestan |
| Place Of Burial: | St. George's Cathedral, Tashkent |
Grand Duke Nicholas Constantinovich of Russia (14 February 1850 – 26 January 1918) was the first-born son of Grand Duke Konstantin Nikolayevich and Grand Duchess Alexandra Iosifovna of Russia and a grandson of Nicholas I of Russia.
Born in Saint Petersburg in the middle of the nineteenth century into the House of Romanov, he had a very privileged childhood. Most royal children were brought up by nannies and servants so by the time Nikolai had grown up he lived a very independent life having become a gifted military officer and an incorrigible womanizer. In 1873, he had an affair with a notorious American woman Henrietta "Harriet" Ely Blackford. In a scandal related to this affair, he stole three valuable diamonds from the revetment of one of the most valuable family icons. He was declared insane and he was banished to Tashkent.[1] Blackford later wrote about the affair in her book "Roman d'une Americaine en Russie" under the pseudonym Fanny Lear.
He lived for many years under constant supervision in the area around Tashkent in the southeastern Russian Empire (now Uzbekistan) and made a great contribution to the city by using his personal fortune to help improve the local area. In 1890 he ordered the building of his own palace in Tashkent to house and show his large and very valuable collection of works of art and the collection is now the center of the state Museum of Arts of Uzbekistan. He was also famous in Tashkent as a competent engineer and irrigator, constructing two large canals, the Bukhar-aryk (which was poorly aligned and soon silted up) and the much more successful Khiva-Aryk, later extended to form the Emperor Nicholas I Canal, irrigating 12,000 desyatinas, 33,000 acres (134 km2) of land in the Hungry Steppe between Djizak and Tashkent. Most of this was then settled with Slavic peasant colonisers.[1]
Nikolai had a number of children by different women. One of his grandchildren, Natalia Androsova, died in Moscow in 1999.
Nikolai died of pneumonia on 26 January 1918. He was buried in St. George's Cathedral (later demolished by the Soviet regime).
Nikolai married Nadezhda (variantly spelled Nadejda) Alexandrovna Dreyer (1861–1929), daughter of Orenburg police chief Alexander Gustavovich Dreyer and Sophia Ivanovna Opanovskaya, in 1882. Two children were born from this marriage: