Columbia subject headings:
Architects--Italy--Correspondence.
Teatro dell'Unione (Viterbo, Italy)
Theater--Italy--Viterbo--History--19th century.
Vespignani, Virginio, 1808-1882--Correspondence.
Harvard subject headings:
Architects--Italy--Correspondence.
Teatro dell'Unione (Viterbo, Italy)
Theater--Italy--Viterbo--History--19th century.
Vespignani, Virginio, 1808-1882--Correspondence.
Princeton subject headings:
Architects--Italy--Correspondence.
Teatro dell'Unione (Viterbo, Italy)
Theater--Italy--Viterbo--History--19th century.
Vespignani, Virginio, 1808-1882--Correspondence.