Columbia subject headings:
Church history--13th century.
Council of Lyon (2nd : 1274 : Lyon, France)
Harvard subject headings:
Catholic Church--Relations--Orthodox Eastern Church.
Catholic Church. Council of Lyons (2nd : 1274)
Council of Lyon (2nd : 1274 : Lyon, France)
Councils and synods--France--Lyon.
France--Church history--Middle Ages, 600-1500.
Orthodox Eastern Church--Relations--Catholic Church.
Princeton subject headings:
Catholic Church. Council of Lyons (2nd : 1274)
Church history--13th century.