Columbia subject headings:
Harvard subject headings:
Gregorovius, Ferdinand, 1821-1891.
Historians--Germany--Biography
Reumont, Alfred von, 1808-1887.
Rome (Italy)--History--1420-1798--Historiography.
Rome (Italy)--History--476-1420--Historiography.
Princeton subject headings:
Gregorovius, Ferdinand, 1821-1891. Geschichte der Stadt Rom im Mittelalter.
Reumont, Alfred von, 1808-1887. Geschichte der Stadt Rom.
Rome (Italy)--Historiography.