At the Battle of Grunwald [ 15 July 1410] the Teutonic Knights were decisively defeated by the Kingdoms of Poland and Lithuania. However battles with their forces and mercaneries would last more than a century longer
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The Warsaw radio mast was the world's tallest structure from its completion on 18 May 1974 until its failure due to human error on 8 August 1991.
Main branch National Museum w/ has several independent branches with permanent collections around the country. In memory are more than 1 000 artifacts missing from WWII looting including The Fight Between Carnival and Lent by Pieter Bruegel the Elder