Columbia subject headings:
Turkey--History--1453-1683--Congresses.
Turkey--History--To 1453--Congresses.
Harvard subject headings:
Islamic civilization--Congresses
Turkey--History--1453-1683--Congresses.
Turkey--History--To 1453--Congresses.
Princeton subject headings:
Turkey--History--1453-1683--Congresses.
Turkey--History--To 1453--Congresses.