Columbia subject headings:
Basilica di San Pietro in Vaticano.
Bernini, Gian Lorenzo, 1598-1680.
Harvard subject headings:
Architecture, Baroque--Vatican City.
Art and state--Vatican City.
Basilica di San Pietro in Vaticano.
Bell towers--Vatican City--Design and construction.
Bernini, Gian Lorenzo, 1598-1680--Criticism and interpretation.
Vatican City--Buildings, structures, etc.
Princeton subject headings:
Architecture, Baroque--Vatican City.
Art and state--Vatican City.
Basilica di San Pietro in Vaticano.
Bell towers--Vatican City--Design and construction.
Bernini, Gian Lorenzo, 1598-1680--Criticism and interpretation.
Vatican City--Buildings, structures, etc.