Columbia subject headings:
Harvard subject headings:
Marginality, Social--Byzantine Empire--Congresses.
Marginality, Social--Europe--History--Congresses.
Maurommatēs, Leōnidas.
Middle Ages--Congresses
Religious tolerance--History--Congresses.
Toleration--History--Congresses.
Princeton subject headings:
Maurommatēs, Leōnidas.
Middle Ages--Congresses.
Religious tolerance--History--Congresses.
Toleration--History--Congresses.