The incident bore similarities with the daubing of a Mark Rothko mural in London's Tate Modern gallery last October, for which Polish national Wlodzimierz Umaniec, 26, was subsequently jailed.
Polish Foreign Minister Wlodzimierz Cimoszewicz said such a move would serve as a reminder to "all those who forgot what World War II was, what its effects and consequences were".
The prime minister, Wlodzimierz Cimoszewicz, made the mistake of suggesting early in July (before the full scale of the disaster was known) that there would be no state aid for victims: the floods, he said severely, should be a lesson to the millions of Poles who are not privately insured.