Columbia subject headings:
Harvard subject headings:
Bruno, Giordano, 1548-1600
Italy--History--1815-1870.
Leo XIII, Pope, 1810-1903
Papacy--History--19th century.
Princeton subject headings:
Bruno, Giordano, 1548-1600.
Italy--History--1815-1870.
Leo XIII, Pope, 1810-1903.
Papacy--History--19th century.