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Case file

Mosque-Madrasa of Sultan Hasan

Wikipedia's first sentence called it “considered stylistically the most compact and unified of all cairo monuments”. Today it says “monumental mosque and madrasa located in salah al-din square in the historic district of cairo”.
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

The Sultan Hassan Mosque and Madrasa (School) is considered stylistically the most compact and unified of all Cairo monuments.1 The building was constructed for Sultan Hassan bin Mohammad bin Qala'oun in 1256 AD as a mosque and religious school for all sects. It was designed so that each of the four main Sunni sects (orthodox Muslim, or Sunni rites, consisting of Shafite, Malikite, Hanefte and Hanbalite) has its own school while sharing the mosque.2 The cornices, the entrance, and the monumental staircase are particularly noteworthy.3

This is Wikipedia's own text, saved in our repository. Their copy of it is revision 17460136.
Today
Wikipedia's first sentence called it “considered stylistically the most compact and unified of all cairo monuments”. Today it says “monumental mosque and madrasa located in salah al-din square in the historic district of cairo”. 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

considered stylistically the most compact and unified of all cairo monuments

Now

monumental mosque and madrasa located in salah al-din square in the historic district of 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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