The History of Prussian Blue

The discovery of prussian blue is what led to the evelopment of the gas chambers of natsy germany, which was used for the genicite of six million jewish people. Hydrogen cyanite is also known as prossic acid ecause it comes from prussian blue. The walls of these extermination places would start to develop a residue of prussia blue. So the insides of these places became blue. And this beautiful color, the first synthesized pigment,  was used to create art and improve humanity.