Sergey Mikhaylovich Solovyov (1820−1879) was a historian, Professor and the Rector of the Moscow University, Academician of the Imperial Academy of Sciences, privy councilor.
Ivan Egorovich Zabelin (1820−1908) was a historian, archeologist, corresponding member of the Imperial Academy of Sciences, privy councilor, collector.
The postal stamps provide portraits of Sergei Solovyov against his book History of Russia since Ancient Times and of Ivan Zabelin against his book Minin and Pozharsky. Straight and Curved Lines in the Time of Troubles.
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