I was scrolling You Tube looking for good Catholic content yesterday and came across a video on this subject that I had never heard of. I won't post the video, which was very anti Catholic, but some of the facts shown made me investigate a little further. Here is an article that seems to list the facts of the matter, and wondered if anyone had ever heard of this? It does not seem to be a hoax, although I cannot believe if that technology exists that it would be secret for this long no matter who tried to hide it. https://www.gaia.com/article/the-chronovisor-the-vaticans-mysterious-time-travel-device
the chronovisor isnt a time machine, it just SHOWS the past. Supposedly the image of Jesus it shown is exactly the same as the one a nun had in a private revelation, then a priest carved it, hence theyre the same face. so, even if this item exists, it doesnt allow *travel* . it just showcases past events
An interesting thing was that the idea was founded by a priest who could hear his father speaking while listening to Gregorian Chant and was some sort of mathematical analysis of the chant to create the machine.