The past specially when it come to world war two is clearly visible in places like Auschwitz - who still is a grave for millions, who disappeared between 1941 and 1944... It is maybe one of the places where the shear volume of history is clearly in the days - and if you just image it, you can se the ghosts of the ones who once walked the pathways - was killed and murdered by the ten of thousands every week... Just ignorants don't understand what Auschwitz means... The germans did their best to kill of as many as they could in the time they had...
I think your daughter got a experience for the rest of her life - what the gray stuff really was, is something she will have learned to fight against..
A furore Normannorum libera nos, Domine, "From the fury of the Northmen deliver us, O Lord."