Columbia subject headings:
Harvard subject headings:
Evangelicalism--History--19th century--Congresses.
Guicciardini, Piero, conte, 1808-1886--Congresses.
Princeton subject headings:
Guicciardini, Piero, conte, 1808-1886--Congresses.
Plymouth Brethren--Congresses.
Protestantism--Italy--Congresses.