Columbia subject headings:
Biblioteca apostolica vaticana--History.
Historiography--History.
History, Ancient--Historiography.
History, Ancient--Manuscripts.
Marginalia--History.
Nicholas V, Pope, 1397-1455--Library.
Harvard subject headings:
Historians--Greece
Historians--Rome
Nicholas V, Pope, 1397-1455--Library.
Nicholas V, Pope, 1397-1455.
Rome--Historiography
Princeton subject headings: