Virgil Leonovich Shantser (Russian: Виргилий Леонович Шанцер; 21 September 1867 — 29 November 1911) (pseudonym - Marat) was a Bolshevik revolutionary active in the Moscow uprising of 1905.[1] He became a leading Bolshevik, but followed Alexander Bogdanov into the Vpered faction in 1909. However he contracted an illness and died in 1911.