Columbia subject headings:
Baptisteries--Germany--History.
Fonts, Medieval--Germany.
Harvard subject headings:
Christian art and symbolism--Germany--Cologne--History--To 1500.
Church decoration and ornament--Germany--Cologne--History--To 1500.
Fonts--Germany--Cologne--History--To 1500.
Liturgy and architecture--Germany--Cologne--History--To 1500.
Sculpture, Medieval--Germany--Cologne.
Princeton subject headings: