Columbia subject headings:
Architecture, Medieval--Russia (Federation)--Ivangorod.
Fortification--Russia (Federation)--Ivangorod (Leningradskai︠a︡ oblastʹ)
Ivangorod (Leningradskai︠a︡ oblastʹ, Russia)--Buildings, structures, etc.
Harvard subject headings:
Architecture, Medieval--Russia (Federation)--Ivangorod.
Fortification--Russia (Federation)--Ivangorod (Leningradskai︠a︡ oblastʹ)
Ivangorod (Leningradskai︠a︡ oblastʹ, Russia)--Buildings, structures, etc.
Princeton subject headings:
Architecture, Medieval--Russia (Federation)--Ivangorod.
Fortification--Russia (Federation)--Ivangorod (Leningradskai︠a︡ oblastʹ).
Ivangorod (Leningradskai︠a︡ oblastʹ, Russia)--Buildings, structures, etc.