A spokeswoman for London's Tate Modern gallery said the gallery was "pleased" with today's court decision.
Wlodzimierz Umaniec has been jailed for two years for defacing a painting by artist Mark Rothko.
Tate is pleased that the court has recognised the severity of this incident and its consequences when sentencing Wlodzimierz Umaniec to two years in prison.
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The families of all four of the victims, all of whom were men, have been informed, police said.
A motorcyclist from Nottingham has died in an accident at the Macau Grand Prix in China, earlier today.