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Karl-Gerät

1940s self-propelled siege mortar of German origin

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General referenceInterpretive dossier study · Crown Archives visual atlas
Record originEnglish Wikipedia
Text licenseCC BY-SA 4.0
Source revisionAug 9, 2026
Entity authorityQ699606
Source-derived summary

Karl-Gerät (040/041) (lit. 'Karl-device' in German), also known as Mörser Karl, was a World War II German self-propelled siege mortar (Mörser) designed and built by Rheinmetall. Its heaviest munition was a 60 cm (24 in) diameter, 2,170 kg (4,780 lb) shell; the range for its lightest shell of 1,250 kg (2,760 lb) was just over 10 km (6 mi). Each gun had to be accompanied by a crane, a two-piece heavy transport set of railcars, and several modified tanks to carry shells.

Seven guns were built, six of which saw combat between 1941 and 1945. It was used in attacking the Soviet fortresses of Brest-Litovsk and Sevastopol, bombarded Polish resistance fighters in the Warsaw Uprising, participated in the Battle of the Bulge, and was used to try to destroy the Ludendorff Bridge during the Battle of Remagen. One Karl-Gerät has survived; the remainder were scrapped after the war.

Development

In March 1936 Rheinmetall made a proposal for a super-heavy howitzer to attack the Maginot Line. Their initial concept was for a weapon that would be transported by several tracked vehicles and assembled on site, but the lengthy preparation time drove them to change it to a self-propelled weapon in January 1937. Extensive driving trials took place in 1938 and 1939 using the first Neubaufahrzeug tank prototype and a scale model to investigate the extremely high ground pressure and steering of such an enormous vehicle. Firing trials took place in June 1939.

Editorial summary

Begin with the source’s own compact description: “Karl-Gerät” is 1940s self-propelled siege mortar of German origin. The dossier treats that line as a proposition to test through Karl-Gerät, 1940s and self-propelled, not as a finished interpretation.

Editorial reviewA concise reference frame for defining the subject, testing terminology and identifying the institution closest to the evidence. The current lead gives the account dated anchors—1941, 1945, 1936, 1937—that can be checked directly. The selected authority fields contribute no independent date. For this dossier, Karl-Gerät, 1940s and self-propelled is the immediate research focus.
Editorial analysis

Why this record matters

The phrase “1940s self-propelled siege mortar of German origin” supplies a clear boundary for inquiry. It also exposes the unanswered questions: who defined that boundary, when it became stable and which sources sit outside it.

Evidence profile

Named sources, stable identifiers and responsible institutions provide the strongest route from overview to verifiable evidence. The source revision retrieved here is dated Aug 9, 2026. The linked authority identifier is Q699606. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1941, 1945, 1936 and 1937.

Critical limits

A concise general-reference account can conceal disagreements about scope, terminology or the weight assigned to individual sources. The lead is largely declarative, so disagreement and counter-evidence require a deliberate search beyond the opening account. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.

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Source & attribution

This entry incorporates text from Karl-Gerät” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.