What was the super-heavy siege artillery developed in Germany on the eve of WW I?

Big Bertha
Violent Karl
Woland's Axe
Panzerfaust
Big Bertha is the name of a type of super-heavy siege artillery developed by the armaments manufacturer Krupp in Germany on the eve of World War I. Its barrel diameter calibre was 420 mm.
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reach: rather globalGermanymilitarytechnologyweaponsWorld War I

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Big Bertha
Violent Karl
Woland's Axe
Panzerfaust
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