[vacri]

... the very first paragraph after the table of contents?

If you check out the Middle Ages section, it shows that the theological debate that it wasn't physical alteration started... at a date that is closer to us than the birth of jesus.

Check out Stercoranism [1] as well (which contributed to the above debate), whose whole basis is that the doctrine of physical change must lead towards normal digestive processes happening, and wondering if this turns the eucharist into, literally, holy shit.

At the end of that article is a bit of modern apologia stating that christ probably leaves as soon as the cracker hits your stomach ('but nobody knows precisely when'[2]). :)

[1] https://en.wikipedia.org/wiki/Stercoranism

[2] god does, after all, move in mysterious ways...

[Gupie]

I cannot find where any of your links say that there was a believe in a literal change, i.e. a change to observable properties.

[vacri]

Well, here you offer a prime example of the power of religion: you are being wilfully ignorant because you don't want something to be a certain way.

You won't be satisfied unless the actual word 'literal' appears? It appears in the first paragraph of the Stercoranism link, and again in the second paragraph.

"the 9th century Carolingian theologian Paschasius Radbertus... wrote an influential tract around 832 upholding the literal interpretation of Christ in the Eucharist". He supported the literal change, but said that the holy bits dissolved before becoming poo.