Columbia subject headings:
Harvard subject headings:
Benefices, Ecclesiastical--Poland--History--To 1500.
Church and state--Poland--History.
Kings and rulers--Religious aspects--Christianity
Monastic and religious life--Poland--History--To 1500.
Poland--History--Piast period, 960-1386
Religious institutions--Poland--History.
Princeton subject headings:
Church and state--Poland--History.
Kings and rulers--Religious aspects--Christianity.
Poland--History--Piast period, 960-1386.
Religious institutions--Poland--History.