Wikipedia's first sentence called it “polish-jewish historian and a professor”. Today it says “polish historian and educator”. The one-line description Wikipedia serves to search engines and AI systems read “Facing the Nazi genocide (2004)”. It now reads “Polish historian and educator Facing the Nazi genocide (2004)”.
Measured, not asserted. Every count, date and revision on this page was taken from Wikipedia's own history and checked against the live article. The words quoted are theirs.
Machine-checked against the full current article on 2026-08-03.
We saved snapshots of this article over twenty years; you are reading the 2025 one. Red dashes: removed from Wikipedia since.Pale dots: rewritten; the numbered note shows what it says now.Red text: written in or rewritten since the previous snapshot.1 tap a number or a side note to jump between them
The opening as it read in 2025
Polish historian and educator Facing the Nazi genocide (2004) Feliks Tych (31 July 1929, Warsaw , Poland – 16 February 2015, Warsaw, Poland ) was a Polish historian and educator. From 1995 to 2006, he was Director of the Jewish Historical Institute ( Żydowski Instytut Historyczny ), served as member of the Council of Science of the Polish Academy of Sciences , and was a member of the editors committee of the Polish Biographical Dictionary . Following him, Polish historian Feliks Tych, a Holocaust survivor, called on former Nazi-occupied states – from France and Holland to Poland, ... "Chronist des Grauens" (in German). juedische-allgemeine.de. 17 February 2015.
This is Wikipedia's own text, saved in our repository. Their copy of it is revision 1297198852.
The opening as it stood in 2010
Feliks Tych (born 31 July 1929 in Warsaw ) is a Polish-Jewish historian and a professor. Director of the Jewish Historical Institute ( Żydowski Instytut Historyczny'), member of the Council of Science of the Polish Academy of Science , member of the editors committee of the Polish Biographical Dictionary . v t e
Red text was written in or rewritten since the previous snapshot. Their copy is revision 296274315.
The opening as it stood in 2015 1 passage from the previous snapshot no longer appear
From 1995 to 2006, he was Director of the Jewish Historical Institute ( Żydowski Instytut Historyczny ), served as member of the Council of Science of the Polish Academy of Science , and was a member of the editors committee of the Polish Biographical Dictionary .The Irish Times . 28 January 2010 .Following him, Polish historian Feliks Tych, a Holocaust survivor, called on former Nazi-occupied states – from France and Holland to Poland, ..."Chronist des Grauens" (in German). juedische-allgemeine.de. 17 February 2015.
Red text was written in or rewritten since the previous snapshot. Their copy is revision 659759504.
The opening as it stood on October 6, 2023
Polish historian and educator Facing the Nazi genocide (2004) Feliks Tych (31 July 1929, Warsaw , Poland – 16 February 2015, Warsaw, Poland ) was a Polish historian and educator. From 1995 to 2006, he was Director of the Jewish Historical Institute ( Żydowski Instytut Historyczny ), served as member of the Council of Science of the Polish Academy of Sciences , and was a member of the editors committee of the Polish Biographical Dictionary . The Irish Times . 28 January 2010 . Following him, Polish historian Feliks Tych, a Holocaust survivor, called on former Nazi-occupied states – from France and Holland to Poland, ... "Chronist des Grauens" (in German). juedische-allgemeine.de. 17 February 2015.
Red text was written in or rewritten since the previous snapshot. Their copy is revision 1116753005.
Today
Wikipedia's first sentence called it “polish-jewish historian and a professor”. Today it says “polish historian and educator”. The one-line description Wikipedia serves to search engines and AI systems read “Facing the Nazi genocide (2004)”. It now reads “Polish historian and educator Facing the Nazi genocide (2004)”. Read the current article and compare.
2010
2015
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Oct '23
2025
genocide
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Counts in the opening at each snapshot. Green: the word gained ground. Red: it was cut. Grey: no change.
What Wikipedia says this is
Every article opens by defining its subject. This one was redefined since 2010, and today's defining sentence is their current revision.
Then
polish-jewish historian and a professor
Now
polish historian and educator
Struck red text is no longer in the article; dotted amber text was rewritten. Every revision id links to Wikipedia's copy; the text shown is our own saved copy. Data: /data. Wikipedia text is CC BY-SA; quoted for the record; not affiliated with Wikipedia.
