Columbia subject headings:
Altstadt (Regensburg, Germany)--Buildings, structures, etc.
Architecture, Medieval--Germany--Regensburg--Guidebooks.
Historic buildings--Germany--Regensburg--Guidebooks.
Regensburg (Germany)--Buildings, structures, etc.
Regensburg (Germany)--Guidebooks.
Stadtamhof (Regensburg, Germany)--Buildings, structures, etc.
Harvard subject headings:
Art--Germany--Regensburg--Guidebooks.
Regensburg (Germany)--Civilization--Guidebooks.
Regensburg (Germany)--History--Guidebooks.
Stadtamhof (Regensburg, Germany)--Civilization--Guidebooks.
Stadtamhof (Regensburg, Germany)--History--Guidebooks.
Princeton subject headings: