Columbia subject headings:
Harvard subject headings:
Rigler, Peter Paul, 1796-1873--Correspondence.
Rigler, Peter Paul, 1796-1873.
Virtues--History--19th century.
Princeton subject headings:
Catholic Church--Italy--Trentino-Alto Adige--Clergy.
Rigler, Peter Paul, 1796-1873--Correspondence.
Rigler, Peter Paul, 1796-1873.
Teutonic Knights--History--19th century.