Marianne Joachim (born Marianna/Marianne Prager: 5 November 1921 - 4 March 1943) was a Jewish German resistance activist during the Nazi years.

She was executed at Plötzensee on 4 March 1943 following an arson attack the previous summer on the party propaganda department's (ironically named) "Soviet Paradise" exhibition in Berlin's "Lustgarten" pleasure park.

Nevertheless, at the time of their marriage Heinz was also a forced labourer, in his case in the "Jews department" at a Siemens plant in Berlin-Spandau.

Marianne Joachim's own forced labour regime had by this time brought her back to Berlin where she was working in Berlin-Wittenau at the Alfred Teves plant[6] which, before the war, had produced car parts.

[7] At around the time of their marriage Heinz and Marianne Joachim became members of what came to be known as the Baum group, a circle of forced labourers living in Berlin.

[2] The Baum group's best known "political action" was an arson attack carried out on 18 May 1942 against the "Soviet Paradise" exhibition in Berlin's "Lustgarten" pleasure park.

[2] The objective of the exhibition was to demonstrate to the people the "poverty, misery, depravity and need" that were features of life in the "Jewish Bolshevist Soviet Union".

"I had my things sent to your address, dear Mom[-in-law], because I do not know for how much longer my [own] dear parents are still here" ("Meinen Nachlass habe ich an Deine Adresse gehen lassen, liebe Mama, weil ich doch nicht weiss, wie lange meine lieben Eltern noch hier sind.