He won distinction by his edition of several ancient Vatican manuscripts and was also learned in the history of art and in archaeology.

The Vatican manuscript has an author, considered to be Theodulf, and a corrector.

The poem is known to us only through one Vatican manuscript, and long escaped the notice of historians.

In the 19th century the Vatican manuscript was utilized for two editions, one by de Rozière (Paris, 1869), the other by von Sickel (Vienna, 1889).

Instituta artium, on the eight parts of speech, also called Ars vaticana from its having been found in a Vatican manuscript.

It transmits only an abbreviated version of the laws, although it also contains some additions and another seven assizes which are lacking in the Vatican manuscript.

Assizes of King Roger, the Vatican manuscript.

The Vatican texts were added in 1823, as well as the end of his Gratiarum actio pro Carthaginiensibus from another Vatican manuscript.

Microfilming of Vatican manuscripts began in 1951, and according to the Library's website, was the largest microfilming project that had been undertaken up to that date.

It originated in southern Europe in the Renaissance and is the script of many Vatican manuscripts.