During WWII around the synagogue there was a Jewish camp established by the Germans.
During WWII around the synagogue there was a concentration camp for Jews established by the Nazis.
Bergman, Eleonora and Jan Jagelski, Zachowane synagogi i domy modlitwy w Polsce. Katalog. (Warsaw, 1996), p. 73 with ill.;
Maria and Kazimierz Piechotka, Bramy Nieba: Bóżnice murowane na ziemiach dawnej Rzeczypospolitej (Warsaw, 1999), pp. 416-7 with ills.;
Przemysław Burchard, Pamiątki i zabytki kultury Żydowskiej w Polsce (Warszawa, 1990), p. 133; Rossiiskaia evreiskaia entsiklopediia (Moscow), vol. 5 - 2004, p. 254
https://jewish-heritage-europe.eu/2020/10/02/poland-restoration-krzepice/