Columbia subject headings:
Harvard subject headings:
Christian hagiography--History--Congresses.
Europe--Church history--Congresses.
Martyrdom--Christianity--History--Congresses.
Persecution--History--Congresses.
Princeton subject headings:
Christian hagiography--History--Congresses.
Europe--Church history--Congresses.
Martyrdom--Christianity--History--Congresses.
Persecution--History--Congresses.