Born in Bielsk-Podlaski, Joseph Lewartowski-Finkelstein was a Communist activist from Bialystock. Before the War,
he accomplished scores of missions on behalf
of the PPR, the clandestine Polish Communist Party. Having arrived in Warsaw at the same time as Pinkus Kartin, he organized the Communist Party inside the Ghetto, and was one of the founding members of the Antifascist Bloc. Joseph Lewartowski-Finkelstein also was the first publisher of “Der Ruf” (“The Call”), the Bloc's bulletin, advocating armed resistance. During the mass deportations,
he took refuge in Alexander Landau's shop.
He was arrested in August 1942, and deported to Treblinka where he died.
