The second thing that strikes me is how fluid the steel was when it was hit. It must almost instantaneously melt when struck by the shells. The steel is very ductile, not brittle.
The third thing that strikes me is that this might have been a test article for the Allies examining the quality of German armor. Would such a fortification actually taken that many hits during battle? The Russians and the U.S. in particular were interested in learning about German armor and frequently tested captured armor.
See "On German Armour" for one interesting take on this.
The second thing that strikes me is how fluid the steel was when it was hit. It must almost instantaneously melt when struck by the shells. The steel is very ductile, not brittle.
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At imgur, a commentor said that ricochet must have been bad. With that fluid surface, maybe not?