Columbia subject headings:
Ekateringof (Saint Petersburg, Russia)
Palaces--Russia (Federation)--Saint Petersburg.
Parks--Russia (Federation)--Saint Petersburg.
Harvard subject headings:
Ekateringof (Saint Petersburg, Russia)
Palaces--Russia (Federation)--Saint Petersburg
Parks--Russia (Federation)--Saint Petersburg.
Princeton subject headings:
Ekateringof (Saint Petersburg, Russia)
Palaces--Russia (Federation)--Saint Petersburg--History.
Parks--Russia (Federation)--Saint Petersburg--History.
Saint Petersburg (Russia)--Buildings, structures, etc.