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House of Knowledge

Wikipedia's first sentence called it “ancient university in the fatimid caliphate”. Today it says “medieval egyptian university built in cairo”. The one-line description Wikipedia serves to search engines and AI systems read “Ancient university of the Fatimid Caliphate”. It now reads “Ancient university in Egypt”.
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 2015 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 2015

House Of Wisdom ( , Dar al-Hikmah) or House of Knowledge ( , Dar al-'Ilm) was an ancient university of the Fatimid Caliphate (today's Egypt ), built in 1004 CE as a library and converted by the Fatimid Imam-Caliph Al-Hakim bi-Amr Allah to a state university in the same year.1 The library’s collection was so vast that historian, Ibn Abi Tayyi’ described it as a “Wonder of the world”.2 Another historian Ahmed Bin Ali Maqrizi says "The House of Wisdom in Cairo did not open its doors to the public except before the furnishing, decoration and beautification of all the doors and corridors, and a large number of servants were appointed. And the number of shelves in forty cabinets, each one of them could accommodate about eighteen thousand books. And (the shelves) were open, and books accessible to everyone. And one who wants a book, then the book can be easily found by him.3 If a book cannot be found by oneself, one can seek the help of hired handlers." In keeping with the Islamic tradition of knowledge, the Fatimids collected books on a variety of subjects and their libraries attracted the attention of scholars from across the world.4 The Imam-Caliph al-Hakim was a great patron of learning and provided paper, pens, ink and inkstands without charge to all those who wished to study there. The Ismailis in the Middle Ages: A History of Survival, A Search for Salvation (New York: Oxford University Press, 2007), 92. The Ismailis in the Middle Ages: a History of Survival, a Search for Salvation (New York: Oxford University Press, 2007), 92.5

This is Wikipedia's own text, saved in our repository. Their copy of it is revision 637147540.
Today
Wikipedia's first sentence called it “ancient university in the fatimid caliphate”. Today it says “medieval egyptian university built in cairo”. The one-line description Wikipedia serves to search engines and AI systems read “Ancient university of the Fatimid Caliphate”. It now reads “Ancient university in Egypt”. Read the current article and compare.
201020152020Oct '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 2010, and today's defining sentence is their current revision.

Then

ancient university in the fatimid caliphate

Now

medieval egyptian university built in cairo

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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