Columbia subject headings:
Art--Vatican City.
Basilica di San Pietro in Vaticano.
Church decoration and ornament--Vatican City.
Vatican City--Buildings, structures, etc.
Harvard subject headings:
Basilica di San Pietro in Vaticano.
Princeton subject headings:
Art--Vatican City.
Basilica di San Pietro in Vaticano.
Church decoration and ornament--Vatican City.
Vatican City--Buildings, structures, etc.