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Case file

Altar

Wikipedia's first sentence called it “any structure upon which sacrifices or other offerings are offered for religious purposes”. Today it says “table or platform for the presentation of religious offerings”.
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 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

Ancient Greek kylix showing a hoplite offering a sacrifice before an altar, around 480 BC. Ancient Agora Museum of Athens in the Stoa of Attalus The ancient Altar of Pergamon , reconstructed at the Pergamon museum, Berlin. It was used by the ancient Celts to make sacrifices upon and is now located in the plaza of the basilica there. Look up altar in Wiktionary, the free dictionary.1 An altar is any structure upon which offerings such as sacrifices and votive offerings are made for religious purposes , or some other sacred place where ceremonies take place. Altars are usually found at shrines , and they can be located in temples , churches and other places of worship.2 Today they are used particularly in the religions of Buddhism , Hinduism , Shinto , Taoism , as well as Christianity , LaVeyan Satanism , Thelema , Neopaganism , and in Ceremonial magic .3 Judaism did so until the destruction of the Second Temple .4 Many historical faiths also made use of them, including Greek and Norse religion.5

This is Wikipedia's own text, saved in our repository. Their copy of it is revision 370614717.
Today
Wikipedia's first sentence called it “any structure upon which sacrifices or other offerings are offered for religious purposes”. Today it says “table or platform for the presentation of religious offerings”. 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

any structure upon which sacrifices or other offerings are offered for religious purposes

Now

table or platform for the presentation of religious offerings

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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