Izrael Kalmanowicz Poznański (1833, Aleksandrów - 1900, Łódź) was a Polish-Jewish businessman, textilemagnate and philanthropist in Łódź, and the husband of Elenora Hertz Poznański. The mausoleum of Izrael and Eleonora Hertz Poznański has been described as "probably the largest Jewish grave monument in the world." The mausoleum and mosaic covering the inside of the dome were restored in 1993.
^Wojalski, Mirosław Zbigniew (2000). The Jewish cemetery in Lodz, p.58. Widzewska Oficyna Wydawnicza ZORA. ISBN 8388638017. Quote: "Across from this sarcophagus stands the magnificent mausoleum of Izrael Poznanski. The largest and most impressive grave monument in this cemetery, and probably the largest Jewish grave monument in the world".
Alfred Döblin (1926) Reise in Polen (in German), published in English translation in 1991 as Journey to Poland (ISBN 1850433631). The book describes the Jewish Łódź of the 1920s.