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Case file

Blue Mosque, Yerevan

Wikipedia's first sentence called it “mosque in yerevan”. Today it says “an 18th-century iranian twelver shia mosque”. The one-line description Wikipedia serves to search engines and AI systems read “18th century Persian mosque in Yerevan”. It now reads “18th century Persian mosque in Yerevan, Armenia”.
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 2025 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 2025

18th century Persian mosque in Yerevan, Armenia For other uses, see Blue Mosque (disambiguation) . The Blue Mosque ( Armenian : Կապույտ մզկիթ ; Persian : مسجد کبود ) is an 18th-century Persian Twelver Shia mosque , located in Yerevan , in modern-day Armenia . It was commissioned by Hoseyn Ali Khan , the khan of the Iranian Erivan Khanate . It is one of the oldest extant structures in central Yerevan and the most significant structure from the city's Iranian period . It was the largest of the eight mosques of Yerevan in the 19th century and is the only active mosque in Armenia today. The mosque was secularized in the 1920s and housed the History Museum of Yerevan for more than five decades. Following Armenia's independence, the mosque was renovated with support from the Iranian government and again started operating as a mosque, serving the Muslims residing in Armenia .

This is Wikipedia's own text, saved in our repository. Their copy of it is revision 1295293477.
Today
Wikipedia's first sentence called it “mosque in yerevan”. Today it says “an 18th-century iranian twelver shia mosque”. The one-line description Wikipedia serves to search engines and AI systems read “18th century Persian mosque in Yerevan”. It now reads “18th century Persian mosque in Yerevan, Armenia”. 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

mosque in yerevan

Now

an 18th-century iranian twelver shia mosque

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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