Columbia subject headings:
Harvard subject headings:
Architecture, Medieval--Europe.
Architecture, Medieval--Germany--Regensburg.
Architecture--Europe--History--Pictorial works.
Architecture--Germany--Regensburg--History--Pictorial works.
Historic buildings--Germany--Regensburg--Pictorial works.
Princeton subject headings:
Architecture, Medieval--Europe.
Architecture, Medieval--Germany--Regensburg.
Architecture--Europe--History--Pictorial works.
Architecture--Germany--Regensburg--History--Pictorial works.
Historic buildings--Germany--Regensburg--Pictorial works.