Columbia subject headings:
Leopoldo II, Grand-Duke of Tuscany, 1797-1870.
Pius IX, Pope, 1792-1878.
Harvard subject headings:
Leopoldo II, Grand-Duke of Tuscany, 1797-1870.
Pius IX, Pope, 1792-1878.
Princeton subject headings:
Leopoldo II, Grand-Duke of Tuscany, 1797-1870.
Pius IX, Pope, 1792-1878.