Columbia subject headings:
Harvard subject headings:
Architecture, Medieval--Baltic Sea Region--Congresses.
Brick churches--Baltic Sea Region--Congresses.
Building, Brick--Baltic Sea Region--Congresses.
Church architecture--Baltic Sea Region--Congresses.
Light in architecture--Congresses.
Princeton subject headings:
Architecture, Medieval--Baltic Sea Region--Congresses.
Brick churches--Baltic Sea Region--Congresses.
Church architecture--Baltic Sea Region--Congresses.
Color in architecture--Congresses.
Light in architecture--Congresses.