When was Sergey Mikhaylovich Prokudin-Gorsky born?
Sergey Prokudin-Gorsky
Sergey Mikhaylovich Prokudin-Gorsky (, ;  – September 27, 1944) was a Russian chemist and photographer. He is best known for his pioneering work in colour photography and his effort to document early 20th-century Russia.
Sergey Gorshkov
Sergey Georgyevich Gorshkov (; 26 February 1910 – 13 May 1988) was an admiral of the fleet of the Soviet Union. Twice awarded the title Hero of the Soviet Union, he oversaw the expansion of the Soviet Navy into a global force during the Cold War.