An 1885 masterwork by Russian realist Ilya Repin was badly damaged by a museum visitor in Moscow, sparking a renewed look into museum security across Russia, and the sale of alcohol in galleries. 

From South China Morning Post:

One of Russia’s leading art galleries announced on Monday it would try to stop the sale of alcohol on its premises after a man attacked a masterpiece with a metal pole after drinking vodka there.

The incident at Moscow’s State Tretyakov Gallery on Friday caused serious damage to one of the country’s most famous paintings – Ivan the Terrible and His Son Ivan on November 16, 1581, which depicts Tsar Ivan cradling his dying son – and raised awkward questions about how Russia protects its historical and cultural artefacts.