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Tadeusz Kossak (1 January 1857 in Paris – 3 July 1935 in Poland), was born into a noted Polish family of artists and writers. He was an officer in the Polish Army, a freedom fighter, and owner of a country estate in Górki Wielkie, that became a mecca for intellectuals of the era. He was the father of writer, and World War II activist and resistance fighter, Zofia Kossak-Szczucka.
He was the son of the celebrated painter, Juliusz Kossak and twin of another noted painter, Wojciech Kossak. After the family's return to Poland from France, where he was born, Kossak attended school first in Warsaw and later in Kraków. He came to prominence in 1907 when he was arrested for political activism against the Imperial Russian authorities and the foreign occupation of Poland. During World War I, in 1917, he joined the Polish Corps of Józef Dowbor-Muśnicki fighting for Polish independence.
In 1922 with his wife, Anna née Kisielnicka, he moved from Kresy Wschodnie in Eastern Poland to Górki Wielkie near Cieszyn in Silesia. There they bought a country estate where they hosted many intellectuals of the period, including, Jan Parandowski, Maria Dąbrowska, Jan Sztaudynger, Melchior Wańkowicz, Wojciech Kossak, Maria Pawlikowska-Jasnorzewska, Magdalena Samozwaniec, Jadwiga Witkiewicz and her husband, Stanisław Ignacy Witkiewicz.
In 1925 Kossak published his war memoires, Wspomnienia wojenne (1918-1920) about the war against The Bolsheviks. He was also the author of a book entitled "Jak to było w armii austriackiej" - 'How it was in the Austrian Army' - published in 1927. He died in July 1935 and was buried on his estate.
- "Historia dworu Kossaków". www.zofiakossak.pl. Retrieved 2014-02-03.
- Tadeusz Kossak Wspomnienia wojenne (1918-1920), Krakowska Spółka Wydawnicza, Kraków, 1925
- http://poryte.4lomza.pl/index.php?k Kalendarium z 7-ką w życiorysach Niepospolitego Rodu Kossaków, date accessed 2014-02-03, Janusz M. Kotowski poryte.4lomza.pl
- (in Polish) ZKS Fundacja im. Zofii Kossak, Historia dworu Kossaków (History of the Kossak Manor) official webpage of the Foundation
- (in Polish) Kalendarium Niepospolitego Rodu Kossaków, Towarzystwo Przyjaciół Ziemi Poryckiej