For centuries, the Vatican's Secret Archive has been the subject of fascination for scholars.
They have wondered just what revelations are lying hidden in documents stored on what now consists of more than 50miles of shelves underground.
In 2020, Pope Francis opened up the files related to the papacy of the controversial Pope Pius XII, allowing researchers the chance to discover why he remained silent about the Nazi Holocaust.
But one claim that we might never know the truth of is the one made by former Pentagon official David Grusch in 2023, that Pius tipped off the US about an alien spacecraft that had crashed in Italy in the 1930s.
He also alleged, in his interview with US cable network News Nation, that the Vatican 'certainly' knew about the existence of non-human intelligences on Earth.
The claim was music to the ears of those who have long sought access to the Vatican's archives in the hope they may contain information about UFOs.
Former UFO investigator Nick Pope, who worked for the Ministry of Defence until 2006, told MailOnline: 'There have been persistent rumours that the Catholic Church knows some big secrets about UFOs, and that these forbidden truths might be hidden somewhere in the Vatican archives, accessible only by the Pope, a select few Cardinals, and other key personnel.'
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