Columbia subject headings:
Church archives--Italy.
Diplomatics--Italy.
Papal documents.
Scuola vaticana di paleografia, diplomatica e archivistica.
Harvard subject headings:
Church archives--Italy.
Diplomatics--Italy.
Papal documents.
Scuola vaticana di paleografia, diplomatica e archivistica.
Princeton subject headings:
Church archives--Italy.
Diplomatics--Italy.
Papal documents.
Scuola vaticana di paleografia, diplomatica e archivistica.