https://youtube.com/watch?v=g6p5tzqa9V4
the #prophecies received by Bernadette of Lourdes. (Bernadette herself of course is extremely well-known, but Xavier Ayral explains that these prophecies, which she had communicated privately to her Bishop, were regarded as so outlandish that he concealed them in the Vatican Library for over 100 years.)

Here are the five prophecies. Xavier only starts to describe them at 42:50 in the video.
Lourdes, then a very tiny and insignificant place, would become a center for healing renowned worldwide, visited by millions.

'Electric energy' (and other new 'machines') would enable people to continue to live and work at night, in the absence of the sun, just as they did during the day.

A 'terrible evil' would rise in Germany, resulting in a great war enveloping Europe and involving many nations of the planet.

Man would travel to and walk on the #moon in 'around 1970'. (Wow.)

Science will develop in ways which will NOT benefit mankind.

A war with Islam, in which a city in 'Persia' (now Iran) would be devastated by an enormous 'bomb', and the 'battle' would result in the deaths of 5,650,451 people. (This was an exact number.) Following the war. Islam would fall, and there would be widespread conversion to Christianity followed by a long period of peace and prosperity.