WIKIPEDIA  RESOURCE

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Czech Republic General Information
https://en.wikipedia.org/wiki/Czech_Republic

Battle of White Mountain 1620
https://en.wikipedia.org/wiki/Battle_of_White_Mountain

Jan Huss
https://en.wikipedia.org/wiki/Jan_Hus

Rudolf II, Holy Roman Emperor
https://en.wikipedia.org/wiki/Rudolf_II,_Holy_Roman_Emperor

Prague
https://en.wikipedia.org/wiki/Prague

Battle of Austerlitz
https://en.wikipedia.org/wiki/Battle_of_Austerlitz

Thirty Years' War
https://en.wikipedia.org/wiki/Thirty_Years%27_War