Izrael Kalman Poznański (1833 in Aleksandrów – 1900 in Łódź) was a Polish-Jewish businessman, textile magnate and philanthropist in Łódź, and the husband of Elenora Hertz Poznański. The mausoleum of Izrael and Eleonora Hertz Poznański on the New Jewish Cemetery 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.
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