Columbia subject headings:
Goebbels, Matthias Joseph Hubert, 1836-1911.
Mural painting and decoration, German--Germany--Cologne.
Mural painting and decoration--Conservation and restoration--Germany--Cologne.
Harvard subject headings:
Essenwein, August von, 1831-1892.
Goebbels, Matthias Joseph Hubert, 1836-1911.
Mural painting and decoration, German--Germany--Cologne.
Mural painting and decoration, Romanesque--Conservation and restoration--Germany--Cologne.
Mural painting and decoration--Conservation and restoration--Germany--Cologne.
Princeton subject headings:
Church decoration and ornament--Germany--Cologne.
Cologne (Germany)--Buildings, structures, etc.
Goebbels, Matthias Joseph Hubert, 1836-1911.
Mural painting and decoration, German--Germany--Cologne.
Mural painting and decoration--19th century--Germany--Cologne.
Mural painting and decoration--Conservation and restoration--Germany--Cologne.