Columbia subject headings:
Harvard subject headings:
Basilica di San Pietro in Vaticano--History.
Bazaars (Charities)--Italy--Rome--History--18th century.
Church music--Italy--Rome--18th century.
Masses--Italy--Rome--History--18th century.
Rome (Italy)--Church history
Princeton subject headings:
Basilica di San Pietro in Vaticano.
Mass (Music)--Italy--Rome--18th century.