Columbia subject headings:
Architects--Germany--Travel--Italy--History--19th century.
Architecture--Germany--History--19th century.
Architecture--Germany--Italian influences.
Germans--Italy--History--19th century.
Italy--Description and travel.
Harvard subject headings:
Architects--Germany--Travel--Italy--History--19th century.
Architects--Travel--Germany--Italy--History--19th century.
Architecture--Germany--History--19th century
Architecture--Germany--Italian influences
Germans--Italy--History--19th century.
Italy--Description and travel.
Princeton subject headings:
Architects--Germany--Travel--Italy--History--19th century.
Architecture--Germany--History--19th century.
Architecture--Germany--Italian influences.
Germans--Italy--History--19th century.
Italy--Description and travel.