A quiet Vatican restoration project accidentally uncovered a sealed passage hidden beneath the Apostolic Archive.
Inside was a small chamber containing a wooden chest locked and sealed since the 1400s.
When archivists opened it, they found vellum documents marked with the papal seal of 1484.
The papers included letters between Pope Innocent VIII and an unnamed Dominican mathematician about a strange celestial light seen in 1483.
The Friar called it Signum Revertens — “the Returning Sign” — suggesting the phenomenon matched the biblical star of the Magi.
One letter from the pope read: “If what you observe is true, then the heavens repeat themselves.”
The Friar replied: “Not shift, Holy Father — align.”
Parts of the documents were leaked, sparking global debate and concern within the Vatican.
Astronomers later noted a faint recurring flare in the same region of the sky, informally named SN-Revertens.
