Valentin Bulgakov

Valentin Fyodorovich Bulgakov (; 25 November 1886 – 22 September 1966) was the last secretary of Leo Tolstoy and his biographer. He served as the director of several literary museums and actively participated in Tolstoyan and pacifist initiatives. He endured imprisonment under the Tsarist regime and internment in a Nazi concentration camp. For the last 20 years of his life, he assumed the role of the head at the Yasnaya Polyana museum. Provided by Wikipedia