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Case file

Thousand Lights Mosque

Wikipedia's first sentence called it “one of the largest mosques in the country and is a revered place of worship for muslims”. Today it says “shi'ite mosque in anna salai in chennai”. The one-line description Wikipedia serves to search engines and AI systems read “13°3′18″N 80°15′18″E  /  13.05500°N 80.25500°E  / 13.05500; 80.25500”. It now reads “Mosque in India 13°3′18″N 80°15′18″E  /  13.05500°N 80.25500°E  / 13.05500; 80.25500”.
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

13°3′18″N 80°15′18″E  /  13.05500°N 80.25500°E  / 13.05500; 80.25500 Thousand Lights ( ), a multi-domed mosque in Anna Salai in Chennai , Tamil Nadu , India , is one of the largest mosques in the country and is a revered place of worship for shia Muslims .1 It was built by Nawab Umdat-ul-Umrah in 1810. Thousand Lights Mosque is a common mosque for shia Muslims. Thousand Lights is home of Ghazi Moulana Ghulam Mahadi Khan of Tamil Nadu and a burial ground is inside. [1] "Prince of Arcot" .2

This is Wikipedia's own text, saved in our repository. Their copy of it is revision 666293160.
Today
Wikipedia's first sentence called it “one of the largest mosques in the country and is a revered place of worship for muslims”. Today it says “shi'ite mosque in anna salai in chennai”. The one-line description Wikipedia serves to search engines and AI systems read “13°3′18″N 80°15′18″E  /  13.05500°N 80.25500°E  / 13.05500; 80.25500”. It now reads “Mosque in India 13°3′18″N 80°15′18″E  /  13.05500°N 80.25500°E  / 13.05500; 80.25500”. 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

one of the largest mosques in the country and is a revered place of worship for muslims

Now

shi'ite mosque in anna salai in chennai

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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