Columbia subject headings:
Cappella Gregoriana (Basilica di San Pietro in Vaticano)--History.
Christian art and symbolism--Vatican City.
Church architecture--Vatican City.
Church decoration and ornament--Vatican City.
Harvard subject headings:
Cappella Gregoriana (Basilica di San Pietro in Vaticano)--History.
Christian art and symbolism--Vatican City.
Church architecture--Vatican City.
Church decoration and ornament--Vatican City.
Princeton subject headings:
Cappella Gregoriana (Basilica di San Pietro in Vaticano)--History.
Christian art and symbolism--Vatican City.
Church architecture--Vatican City.
Church decoration and ornament--Vatican City.