Columbia subject headings:
Harvard subject headings:
Architecture, Modern--19th century--Germany--Prussia.
Architecture, Modern--19th century--Rhine River Valley.
Castles--Rhine River Valley.
Frederick William IV, King of Prussia, 1795-1861--Art patronage.
Gothic revival (Architecture)--Rhine River Valley.
Princeton subject headings:
Architecture, Modern--19th century--Prussia.
Architecture, Modern--19th century--Rhine River Valley.
Castles--Rhine River Valley.
Frederick William IV, King of Prussia, 1795-1861--Art patronage.
Gothic revival (Architecture)--Rhine River Valley.