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.
Sergius of Radonezh
In December 1937, Pavel Florensky (1882–1937), a Russian theologian, priest, mathematician, inventor, philosopher and engineer died in the Soviet Gulag and it is thought he was condemned by an extrajudicial NKVD troika under NKVD Order No. 00447 to be executed during the 1930s Bolshevik purges after refusing to disclose the hiding place of Sergius' head which the Bolsheviks wanted destroyed. It is rumored that Florensky and other theologians were involved in a plot to save and hide the relics of St. Sergius. The relics were returned by Pavel Golubtsov, later "Archbishop Sergius," to the Troitse-Sergiyeva Lavra (Trinity Cathedral) of the lavra in 1946 when it was reopened.