The “chronovisor” allegedly can be used to look back in time. According to Father François Brune (born 1931, in France), another Roman Catholic priest, Father Pellegrino Ernetti (1925 – 1994) built the device. Fr. Ernetti was an Italian priest and also a scientist and author.

Fr. Brune, who had written a number of books about both religion and the paranormal, wrote about the chronovisor in “Le noveau nouveau mystère du Vatican” or, in English, “The Vatican’s New Mystery”, published in 2002. Early in the 1960’s, Fr. Ernetti read some of Fr. Brune’s work and, according to legend, assembled a team of a dozen leading scientists, including Enrico Fermi and Wehrner von Braun, and they helped Brune build the chronvisor.

Using a cathode ray tube, it supposedly works by picking up electromagnetic radiation left by past events and “decoding” that energy to produce images and sound. With it, Ernetti purportedly viewed the crucifixion of Jesus of Nazareth and a long-lost Quintus Ennius performance of the 169 BCE play, “Thyestes”.

Some believe that the device exists, works, and is used by the Vatican or secular governments to control current events. In his 1947 science-fiction novella, “E for Effort”, T. L. Sherred wrote about a shockingly similar time-viewing device.

More Info: en.wikipedia.org