Landkreuzer P. 1000 Ratte, Experimantal Super Tank Design (1942 to 1943) German weapon manufacturing company Friedrich Krupp AG designed this super heavy tank in 1942 upon approval of Adolf Hitler. But German Minister of Armaments and War Production, Albert Speer cancelled the project in 1943 before any units were constructed. At 1000 metric tons, if built, it would have been 5 times heavier than the heaviest tank ever built, Panzer VIII Maus. It was designed to be armed with naval artillery w