Columbia subject headings:
Classrooms--Europe--Designs and plans--History--19th century--Exhibitions.
Classrooms--Europe--Designs and plans--History--20th century--Exhibitions.
School buildings--Europe--History--Exhibitions.
Schools--Furniture, equipment, etc.--History--Exhibitions.
Harvard subject headings:
Classrooms--Designs and plans--Europe--History--19th century.
Classrooms--Designs and plans--Europe--History--20th century.
School buildings
Schools--Furniture, equipment--Pictorial works.
Princeton subject headings:
Classrooms--Designs and plans--Europe--History--19th century.
Classrooms--Designs and plans--Europe--History--20th century.
School buildings.
Schools--Furniture, equipment--Pictorial works.