Columbia subject headings:
Architecture and society--Italy--Ferrara--History.
Architecture, Renaissance--Italy--Ferrara.
Estates (Social orders)--Italy--Ferrara--History.
Este family.
Ferrara (Italy)--Civilization.
Harvard subject headings:
Art--Italy--Ferrara--Congresses--1980.
Este family.
Ferrara (Italy)--Civilization.
Princeton subject headings:
Este family.
Ferrara (Italy)--Civilization.
Ferrara (Italy)--History.
Italy--Court and courtiers.