Columbia subject headings:
Bishops--Spain--León--Biography.
Leon (Kingdom)--Church history.
Harvard subject headings:
Bishops--Spain--Leon (Kingdom)
Catholic Church--Bishops--History.
Catholic Church--Bishops.
Catholic Church--Spain--Leon (Kingdom)--History--Sources.
Catholic Church--Spain--Leon (Kingdom)--History.
Dioceses--Spain--Leon (Kingdom)--History--To 1500.
Leon (Kingdom)--Church history.
Princeton subject headings: