Columbia subject headings:
Harvard subject headings:
Books--History--1450-1600--Congresses.
Books--History--400-1450--Congresses.
Illumination of books and manuscripts, Medieval--Congresses.
Manuscripts, Medieval--History--Congresses.
Princeton subject headings:
Books--History--1450-1600--Congresses.
Books--History--400-1450--Congresses.
Manuscripts, Medieval--History--Congresses.