Rembrandts famous 'The Night Watch' has had an eventful 380 years of existence. The name itself is interesting enough, with the painting not actually depicting a night scene. The painting was for much of its life covered with a thick and darkened layer of varnish, which gave it a dark and gloomy feeling, as if the watchmen were rallying at night. But in fact the scene was not meant to be set at night by Rembrandt. The name stuck regardless, and the thick layer of varnish actually helped save the painting when an jobless and desperate shoemaker tried to slash it with a shoemaker's knife in 1911. The knife luckily didn't cut deep enough to pass the varnish. But unfortunately later attackers managed to do some damage. In 1975 an unemployed and mentally ill school teacher cut the canvas with a bread knife, claiming it was God who told him to do it. It would take four years to restore the damages. Another incident found place in 1990, when an escaped psychiatric patient sprayed acid on the painting with a concealed pump bottle. This time security at the Rijksmuseum luckily intervened quickly enough for the acid to only damage the varnish, and not the paint, and the painting was fully restored.