Augustin Theiner

He was commissioned by Pope Pius IX, who had given him a position in the Vatican Library in 1850, to write the Geschichte des Pontifikats Klemens XIV (1853; Italian translation, 1855).

In any event, he was buried at the Teutonic Cemetery, adjacent to St. Peter's Basilica, which is reserved for German-speaking residents of the city in service to the institutions of the Catholic Church.

[1] As young men, Theiner and his brother Anthony wrote Einfuhrung der erzwungenen Ehelosigkeit bei den Geistlichen (1828).

After converting to Catholicism, Theiner wrote Geschichte der geistlichen Bildungsanstalten (1835) and Disquisitiones criticae (1836), on the sources of canon law.

After becoming a priest, Theiner wrote: As prefect of the Vatican Secret Archive, he published: After his death appeared the work, Acta genuina Concilii Tridentini (1874), very imperfectly edited.