Columbia subject headings:
Architecture--Conservation and restoration--Germany--Regensburg.
Architecture--Germany--Regensburg--History--19th century.
Architecture--Germany--Regensburg--History--20th century.
City planning--Germany--Regensburg--History.
Regensburg (Germany)--Buildings, structures, etc.
Harvard subject headings:
Architecture--Germany--Regensburg--19th century.
Architecture--Germany--Regensburg--20th century.
Regensburg (Germany)--Buildings, structures, etc.
Princeton subject headings: