Columbia subject headings:
Religious minorities--Portugal--History--Congresses.
Religious minorities--Spain--History--Congresses.
Harvard subject headings:
Iberian Peninsula--History--Congresses.
Iberian Peninsula--Social conditions--Congresses.
Minorities--Iberian Peninsula--History--Congresses.
Minorities--Iberian Peninsula--Social conditions--Congresses.
Religious minorities--Iberian Peninsula--History--Congresses.
Religious minorities--Iberian Peninsula--Social conditions--Congresses.
Princeton subject headings: