The history of the Russian Orthodox Church of the XX century has recorded the names of many outstanding people. Biographies of some are known in detail, others are rather scant for information. This also applies to the lives of bishops. Such gaps can be filled with unexplored archival materials. This article attempts to correct and supplement the biography of an outstanding figure of the Russian Orthodox Church in the late XIX - early XX century, bishop Nikodim (Voskresensky).