Columbia subject headings:
Altarpieces, Baroque--Germany--Cologne.
Altarpieces, Rococo--Germany--Cologne.
Altarpieces--Germany--Cologne.
Altars, Baroque--Germany--Cologne.
Altars, Rococo--Germany--Cologne.
Altars--Germany--Cologne.
Harvard subject headings:
Altarpieces, Baroque--Germany--Cologne.
Altarpieces, Rococo--Germany--Cologne.
Altarpieces--Germany--Cologne.
Altars, Baroque--Germany--Cologne.
Altars, Rococo--Germany--Cologne.
Altars--Germany--Cologne.
Princeton subject headings: