Columbia subject headings:
Architecture--Russia (Federation)--Orel (Orlovskai︠a︡ oblastʹ)--History.
Historic buildings--Russia (Federation)--Orel (Orlovskai︠a︡ oblastʹ)
Orel (Orlovskai︠a︡ oblastʹ, Russia)--Buildings, structures, etc.--Pictorial works.
Orel (Orlovskai︠a︡ oblastʹ, Russia)--History--Pictorial works.
Harvard subject headings:
Architecture--Russia (Federation)--Orel (Orlovskai︠a︡ oblastʹ)--History.
Historic buildings--Russia (Federation)--Orel (Orlovskai︠a︡ oblastʹ)
Orel (Orlovskai︠a︡ oblastʹ, Russia)--Buildings, structures, etc.--Pictorial works.
Orel (Orlovskai︠a︡ oblastʹ, Russia)--History--Pictorial works.
Princeton subject headings: