A system of tunnels cut into the Kohnstein hill to build V2 rockets after Allied bombing forced the programme underground, worked by prisoners deported from across occupied Europe. The memorial that documents the site states plainly that its own count of the dead is a floor, not a ceiling.
At a glance
The tunnel system beneath the Kohnstein hill began in 1936 as a Wehrmacht fuel depot, not as a purpose-built factory. After the RAF’s August 1943 raid on the V2 development centre at Peenemünde, the German army moved rocket assembly underground here, expanding the tunnels with prisoner labour from October 1943 and beginning production of the V2 (A4) missile that December. The Mittelbau camp system that supplied that labour — of which Dora was the main camp — held tens of thousands of deportees between 1943 and 1945, under conditions the site’s own memorial documents in detail.
Today the KZ-Gedenkstätte Mittelbau-Dora memorial and museum occupies the site, with sections of the tunnel system open to visitors.
Key facts
- Construction: two parallel S-shaped main tunnels, each over 1.6 km long and roughly 9 metres wide, linked by 46 cross-tunnels; work to expand the existing depot into a missile factory began October 1943 under a war contract awarded to Mittelwerk GmbH on 19 October 1943 for 12,000 A-4 (V2) missiles. Assembly began late December 1943. The declared target of 900 missiles a month was never reached.
- Prisoners: the memorial’s own figures put roughly 60,000 deportees through the Mittelbau camp system between August 1943 and March 1945; the camp population stood at 32,471 on 1 November 1944 and roughly 40,000 by March 1945, with the Dora main camp alone holding 13,700–16,000 at various points. Documented nationalities include Soviet, Polish, French, German, Belgian and Italian prisoners, with Soviet and Polish prisoners together making up more than half the total by late 1944.
- Deaths: the memorial does not give a single figure but a stated range with components — around 12,000 deaths recorded in surviving SS documentation; an unregistered and unknown further number; over 5,000 weakened prisoners sent on transports to Lublin-Majdanek and Bergen-Belsen in early 1944 and March 1945; an unknown further toll from the death marches of April 1945; and roughly 1,300 bodies found by American forces at the Boelcke-Kaserne in Nordhausen at liberation. The memorial’s own stated conclusion is that «even on a cautious estimate, at least 20,000» of the deportees did not survive — a figure independently corroborated by the United States Holocaust Memorial Museum’s own account of the camp.
- Working and living conditions: prisoners worked 12-hour shifts; in the initial phase, from autumn 1943 into early 1944, they were housed inside the unfinished tunnels themselves, without daylight, adequate air or sanitation. Recorded monthly deaths rose from 5 in September 1943 to 669 in January 1944, with almost 6,000 dead by early April 1944, chiefly from pneumonia, tuberculosis, typhus and dysentery. Prisoners were gradually moved to surface barracks through the first half of 1944.
- Liberation: US forces of the 3rd Armored Division and 104th Infantry Division reached Nordhausen on 11 April 1945 and found roughly 1,300–2,000 bodies at the Boelcke-Kaserne, where sick prisoners had been concentrated.
- The Dora trial, Dachau, 1947: United States of America v. Kurt Andrae et al., 7 August–30 December 1947, tried 19 defendants — 14 SS personnel, 4 prisoner functionaries (Kapos) and one civilian, Mittelwerk GmbH’s general manager Georg Rickhey. Verdicts: 4 acquittals, including Rickhey; 1 death sentence, for camp commandant Hans Möser, held responsible for the early-April death march and executed in November 1948; 7 life sentences; 7 fixed terms of 5 to 25 years.
- Coordinates: 51.5345° N, 10.7507° E.
Who tells it, and where the accounts diverge
Three separate accounts of this site have coexisted since the war, and a dedicated academic archive (the University of Alabama in Huntsville’s Mittelbau-Dora project) documents the tension between them directly. The postwar American account, built around the engineers who moved to Huntsville, Alabama to found the US space programme, largely omitted the forced-labour history: NASA’s own online biography of Wernher von Braun, still current, devotes only two sentences of a seven-paragraph account to his party membership, SS rank and the use of slave labour under his programme. Popular film treatments of the period, including a 1960 biopic, left the forced-labour history out entirely. East Germany’s own postwar memorial, opened in 1966, told a different but similarly filtered story, framed around Communist resistance within the camp and casting von Braun as a war criminal in absentia.
What changed the record was direct testimony. A 1979 survivor memoir renewed public and academic attention, leading to a US Department of Justice investigation that in 1984 resulted in engineer Arthur Rudolph — who had recommended adopting SS-camp labour for missile production in an April 1943 memo, and whose Mittelwerk-era reports on «saboteurs» led to prisoner hangings — voluntarily giving up his US citizenship rather than contest the findings. Von Braun, who by his own 1969 testimony visited Mittelwerk around fifteen times and who a 1944 memo places at Buchenwald selecting prisoner labour, was never tried; his biographer Michael Neufeld, the senior curator responsible for the standard academic account, concludes von Braun «almost certainly» knew what forced labour at the site involved, while noting that his own book gives von Braun what one reviewer called «a surprising benefit of the doubt» about the extent of that knowledge. The Smithsonian’s own interview with Neufeld is titled, without qualification, «How much did Wernher von Braun know, and when did he know it?» — a question the historical record answers only in part.
What you see today
- Sections of the tunnel system, including original galleries, open to visitors as part of the memorial site.
- The KZ-Gedenkstätte Mittelbau-Dora museum and documentation centre, on the site of the former camp.
- Memorial markers and the remains of camp structures on the surface site.
Getting there
The memorial is at Kohnsteinweg 20, Nordhausen, in Thuringia; it is open to the public with regular visiting hours, guided tours and a documentation centre.
Sources
- KZ-Gedenkstätte Mittelbau-Dora (dora.de), official memorial site — construction, prisoner numbers, the stated death toll and its documented limits, working conditions.
- United States Holocaust Memorial Museum, Mittelbau (Dora) Main Camp (encyclopedia.ushmm.org) — independent corroboration of prisoner and death figures, liberation, death marches.
- Wikipedia, Dora trial, cross-referenced with primary trial records — the Dachau proceedings and verdicts.
- University of Alabama in Huntsville, Mittelbau-Dora project (dora.uah.edu) — the postwar American, East German and survivor-testimony accounts and how they diverge.
- Michael J. Neufeld, biographer of Wernher von Braun, interviewed by Smithsonian Air & Space — the extent and timing of von Braun’s knowledge of forced labour at the site.
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