Columbia subject headings:
Alfonso III d'Este, Duke of Modena, 1591-1644--Correspondence.
Guercino, 1591-1666--Correspondence.
Modena (Italy)--History--17th century.
Modena (Italy)--Kings and rulers--Correspondence.
Painters--Italy--Correspondence.
Harvard subject headings:
Alfonso III d'Este, Duke of Modena, 1591-1644--Correspondence.
Guercino, 1591-1666--Correspondence.
Modena (Italy)--History--17th century.
Modena (Italy)--Kings and rulers--Correspondence.
Painters--Italy--Correspondence
Princeton subject headings:
Alfonso III d'Este, Duke of Modena, 1591-1644--Correspondence.
Guercino, 1591-1666--Correspondence.
Modena (Italy)--History--17th century.
Modena (Italy)--Kings and rulers--Correspondence.
Painters--Italy--Correspondence.