Joanna Grudzińska
Polish noble / From Wikipedia, the free encyclopedia
Joanna Grudzińska (17 May 1791, Poznań - 17 November 1831, Tsarskoye Selo) was a Polish noble, a Princess of Łowicz and the second wife of Grand Duke Constantine Pavlovich of Russia, the de facto viceroy of the Kingdom of Poland. This marriage cost Constantine the crown of Russia.