Ilya Repin “Ivan Grozny and his son Ivan”/ knife

(In 1913, a 29-year-old iconographer named Abram Balashev attacked the painting while it was on view in the Tretyakov Gallery in Moscow, repeatedly screaming “Stop the bloodshed!” as he did it. Balashev was found mentally ill and restricted to a psychiatric hospital. The painting was able to be restored.)