Columbia subject headings:
Harvard subject headings:
Engraving, European--Themes, motives--Catalogs.
Etching, European--Themes, motives--Catalogs.
Museo nazionale di Castel Sant'Angelo--Catalogs.
Museo nazionale di Castel Sant'Angelo--In art--Catalogs.
Rome (Italy)--Buildings, structures, etc.--In art--Catalogs.
Rome (Italy)--In art--Catalogs.
Princeton subject headings:
Engraving, European.
Etching, European.
Museo nazionale di Castel Sant'Angelo--In art.
Rome (Italy)--In art.