The Lubavitch/Schneerson Collection consists of about 12,000 books and 50,000 religious documents and manuscripts from, and which belonged to, the first Chabad Rebbes starting with Rabbi Schneur Zalman, until Rabbi Sholom Dovber Schneersohn.
When the Lubavitch collection was confiscated in 1924 and given to the new Russian State Library, Rabbi Yosef Yitzchak began to rebuild his library anew [REF].