Kazimierz Zakrzewski
Encyclopedia
Kazimierz Zakrzewski was a Polish
Poland
Poland , officially the Republic of Poland , is a country in Central Europe bordered by Germany to the west; the Czech Republic and Slovakia to the south; Ukraine, Belarus and Lithuania to the east; and the Baltic Sea and Kaliningrad Oblast, a Russian exclave, to the north...

 historian and publicist, a professor of the University of Warsaw
University of Warsaw
The University of Warsaw is the largest university in Poland and one of the most prestigious, ranked as best Polish university in 2010 and 2011...

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Zakrzewski was a co-originator of Polish syndicalism
Syndicalism
Syndicalism is a type of economic system proposed as a replacement for capitalism and an alternative to state socialism, which uses federations of collectivised trade unions or industrial unions...

 movement, activist of Związek Związków Zawodowych, researcher of ancient history
Ancient history
Ancient history is the study of the written past from the beginning of recorded human history to the Early Middle Ages. The span of recorded history is roughly 5,000 years, with Cuneiform script, the oldest discovered form of coherent writing, from the protoliterate period around the 30th century BC...

 (mainly late-ancient) and culture of Byzantine Empire. Author of book Historia Bizancjum ("History of Byzantine Empire") and co-author of Wielka historia powszechna.
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