Re Ex Cathedra: From my ai ..

The "Cathedra" meme generally refers to a viral phrase and image macro popularized by Jordan Peterson in March 2023. He posted an image of Evian water bottles stacked in a way that, due to light refraction, resembled the spires of a Gothic cathedral.

The Core Meme: "There are cathedrals everywhere..."
The phrase associated with the meme is: "There are cathedrals everywhere for those with the eyes to see".
Reddit

Origin: While popularized by Peterson's X post, the quote is actually attributed to the French artist Henri Matisse, who used it to express finding beauty and gratitude in everyday life after a major surgery.

The Joke: Internet users quickly turned the earnest, philosophical post into a meme by pairing the quote with increasingly absurd or mundane objects that vaguely look like cathedrals, such as Taco Bell cups or random industrial equipment.
Reddit

Dark ages facts | Cathedral meme
This place is Cologne Cathedral in Germany if you wanted to ...

Other Variations

While the "eyes to see" phrase is the most prominent, there are other niche "cathedra" or cathedral-related memes:
Ex Cathedra Memes: Found in Catholic meme communities, these refer to the Latin term ex cathedra ("from the chair"), which describes the Pope's infallible authority.
The "Can't find the Cathedral" joke: A play on words often used by accounts like No Context Brits, typically making a crude double entendre about male anatomy.

It would help to know what you mean by 'Ex Cathedra' .. otherwise a meaningless comment. Ta.