For 150 years it has been alleged that Augustin Theiner had been dismissed as Prefect of the Vatican Archives because he had given the rules of procedure of the Council of Trent to the bishops of the council minority. Thus writes the Augsburg’s “Allgemeine Zeitung” in June 1870, and in consequence many other newspapers. The eyewitnesses are far from agreement. Other reasons may have led to the dismissal. Historians, however, have considered the newspaper’s account to be true. But Trento’s rules of procedure were already widely known. So it seems unlikely that the Pope, who in 1867 made Trent’s documents available to a group of cardinals and consultors, would deprive Theiner of the keys simply because he had shown this well known documents to the bishops of the minority.