Columbia subject headings:
Basilica di San Pietro in Vaticano--Design and construction.
Basilica di San Pietro in Vaticano--History.
Vatican City--Antiquities, Roman.
Vatican City--Buildings, structures, etc.--History.
Harvard subject headings:
Basilica di San Pietro in Vaticano--Design and construction.
Basilica di San Pietro in Vaticano--History.
Vatican City--Antiquities, Roman.
Vatican City--Buildings, structures, etc.--History.
Princeton subject headings:
Basilica di San Pietro in Vaticano--History.
Building materials--Recycling--Italy--Rome--History.
Catalogs.
Rome (Italy)--Antiquities--Catalogs.
Rome (Italy)--Antiquities.
Vatican City--Buildings, structures, etc.