Columbia subject headings:
Church and the world--History--Congresses.
Church tax--History--Congresses.
Feudalism--Economic aspects--Congresses.
Tithes--History--Congresses.
Harvard subject headings:
Church and the world--History--Congresses.
Tithes--History--Congresses.
Princeton subject headings:
Church and the world--History--Congresses.
Church tax--History--Congresses.
Feudalism--Economic aspects--Congresses.
Tithes--History--Congresses.