Columbia subject headings:
Architecture, Medieval--France--Laon.
Canons, Cathedral, collegiate, etc.
Catholic Church--France--Clergy.
Cathédrale de Laon.
Church architecture--France--Laon.
Harvard subject headings:
Canons, Cathedral, collegiate, etc.--France--Laon--History.
Cathédrale de Laon. Chapitre--History.
Laon (France)--Church history.
Princeton subject headings:
Canons, Cathedral, collegiate, etc.
Catholic Church--France--Clergy.
Notre-Dame (Cathedral : Laon, France)