Columbia subject headings:
Harvard subject headings:
Architectural drawing--18th century--Italy--Rome--Catalogs.
Grassi, Orazio, 1583-1654--Catalogs.
Pontificia Università gregoriana. Archivio--Catalogs.
Princeton subject headings:
Architectural drawing--Italy--17th century--Catalogs.
Catalogs.
Grassi, Orazio, 1583-1654--Catalogs.
Jesuit architecture--Italy--Catalogs.
Pontificia Università gregoriana. Archivio--Catalogs.