Columbia subject headings:
Architecture, Medieval--Europe.
Architecture, Medieval--Social aspects--Europe.
Buildings--Europe--History--To 1500.
Harvard subject headings:
Architecture, Medieval--Europe.
Architecture, Medieval--Social aspects--Europe.
Buildings--Europe--History--To 1500.
Princeton subject headings:
Architecture, Medieval--Europe.
Architecture, Medieval--Social aspects--Europe.
Buildings--Europe--History--To 1500.