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Case file

Jerusalem syndrome

Wikipedia's first sentence called it “name given to a group of mental phenomena involving the presence of either religiously themed obsessive ideas”. Today it says “group of mental phenomena involving the presence of religiously themed ideas or experiences that are triggered”. The one-line description Wikipedia serves to search engines and AI systems read “Group of mental phenomena Man who claims to be a Messiah in Tel Aviv , 2010”. It now reads “Group of mental phenomena Man claiming to be the messiah in Tel Aviv , 2010”.
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

Jerusalem syndrome is the name given to a group of mental phenomena involving the presence of either religiously themed obsessive ideas, delusions or other psychosis -like experiences, that are triggered by, or lead to, a visit to the city of Jerusalem .1 The best known, although not the most prevalent manifestation of the Jerusalem syndrome, is the phenomenon whereby a person who seems previously balanced and devoid of any signs of psychopathology , becomes psychotic after arriving in Jerusalem. The psychosis is characterised by an intense religious theme and typically resolves to full recovery after a few weeks, or after being removed from the area. Yair Bar El et al. claimed that there is a specific syndrome which emerges in tourists who had no previous psychiatric history. However this has been disputed, especially by Dr.2 They stressed that nearly all of the tourists who demonstrated the described behaviours were already mentally ill prior to their arrival to Jerusalem.3 Further, of the small proportion alleged to have exhibited spontaneous psychosis after arrival in Jerusalem, there was no evidence presented that they had previously been well.4

This is Wikipedia's own text, saved in our repository. Their copy of it is revision 16033204.
Today
Wikipedia's first sentence called it “name given to a group of mental phenomena involving the presence of either religiously themed obsessive ideas”. Today it says “group of mental phenomena involving the presence of religiously themed ideas or experiences that are triggered”. The one-line description Wikipedia serves to search engines and AI systems read “Group of mental phenomena Man who claims to be a Messiah in Tel Aviv , 2010”. It now reads “Group of mental phenomena Man claiming to be the messiah in Tel Aviv , 2010”. Read the current article and compare.
2005201020152020Oct '232025
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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 2005, and today's defining sentence is their current revision.

Then

name given to a group of mental phenomena involving the presence of either religiously themed obsessive ideas

Now

group of mental phenomena involving the presence of religiously themed ideas or experiences that are triggered

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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