Columbia subject headings:
Architecture--Germany--Thuringia--History--20th century--Exhibitions.
Architecture--Germany--Thuringia--History--21st century--Exhibitions.
Cities and towns--Germany--Thuringia--Exhibitions.
City planning--Germany--Thuringia--Exhibitions.
Landscape protection--Germany--Exhibitions.
Regional planning--Germany--Thuringia--Exhibitions.
Harvard subject headings:
Architecture--Germany--Thuringia--20th century.
Architecture--Germany--Thuringia--21st century.
City planning--Germany--Thuringia.
Landscape protection--Germany.
Regional planning--germany--Thuringia.
Princeton subject headings: