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Case file

Finsbury Park Mosque

Finsbury Park Mosque in London became internationally known after Abu Hamza al-Masri took it over as imam. The 2010 opening said leadership disputes in the 1990s allowed "extremist Islamist preachers" to take over the mosque, which "developed a reputation as a centre of radical Islamism in London." Today's opening calls Abu Hamza only "a radical preacher," without the word Islamist; it survives once elsewhere in the article. A reader arriving at the opening today learns the mosque gained a radical preacher, and not that Wikipedia once described that takeover, and the mosque's reputation, as Islamist.
Read line by line and written up by hand.
Machine-checked against the full current article on 2026-08-01. “islamist” appeared 2 times in this article's opening at its peak. Today the opening has none; the body has 1.
We saved snapshots of this article over twenty years; you are reading the 2010 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 2010

The interior of the dome inside the North London Central Mosque North London Central Mosque in Finsbury Park, London was built in the 1990s to serve the large Muslim population in the area. It has a capacity of 1,800 people. Until 2005 it was known as Finsbury Park Mosque .1 The mosque was riven with leadership disputes in the 1990s, allowing extremist Islamist preachers (many of which were refugees from the Algerian Civil War ) to take it over. In 1996 they installed Abu Hamza al-Masri as imam of the mosque, which subsequently developed a reputation as a centre of radical Islamism in London. British Broadcast Corporation . : CS1 maint: extra punctuation ( link )2

This is Wikipedia's own text, saved in our repository. Their copy of it is revision 363208377.
Today
“islamist” appeared 2 times in this article's opening at its peak. Today the opening has none; the body has 1. Read the current article and compare.
2005201020152020Oct '232025
islamist122000
terror000111
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 between 2005 and 2025.

Then

built c

Now

five-storey mosque located next to finsbury park station close to arsenal football club 's emirates stadium

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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