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Case file

Robert of Ketton

Wikipedia's first sentence called it “medieval theologian”. Today it says “english astronomer”. The one-line description Wikipedia serves to search engines and AI systems read “12C English astronomer, translator, priest and diplomat”. It now reads “12th-century English translator and priest”.
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 2005 one. Red dashes: removed from Wikipedia since. Pale dots: rewritten; the numbered note shows what it says now. 1 tap a number or a side note to jump between them
The opening as it read in 2005

Robert of Ketton was a medieval theologian .1 Believed to have been educated at the Cathedral School of Paris , in 1134 he travelled to France , the Byzantine Empire , and the Crusader States in Palestine with fellow scholar Herman of Carinthia .2 He became the Archdeacon of Pamplona and in 1143 he was commissioned by Peter the Venerable , abbot of Cluny , to translate the Qur'an into Latin .3 Entitled Lex Mahumet pseudoprophete , it was the first translation of the book into a European language and remained the standard well into the sixteenth century. v t e4

This is Wikipedia's own text, saved in our repository. Their copy of it is revision 15939917.
Today
Wikipedia's first sentence called it “medieval theologian”. Today it says “english astronomer”. The one-line description Wikipedia serves to search engines and AI systems read “12C English astronomer, translator, priest and diplomat”. It now reads “12th-century English translator and priest”. Read the current article and compare.
2005201020152020Oct '232025
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 2005, and today's defining sentence is their current revision.

Then

medieval theologian

Now

english astronomer

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.

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