Columbia subject headings:
Catholic Church--Relations--Orthodox Eastern Church--History.
Frederick II, Holy Roman Emperor, 1194-1250.
Giovanni, da Parma, approximately 1208-1289.
Orthodox Eastern Church--Relations--Catholic Church--History.
Papacy--History--To 1309.
Sinodo di Ninfeo.
Harvard subject headings:
Catholic Church--Relations--Orthodox Eastern Church--History.
Catholic Church--Relations--Orthodox Eastern Church.
Frederick II, Holy Roman Emperor, 1194-1250.
Giovanni, da Parma, approximately 1208-1289
Orthodox Eastern Church--Relations--Catholic Church--History.
Orthodox Eastern Church--Relations--Catholic Church.
Papacy--History--To 1309
Sinodo di Ninfeo.
Princeton subject headings:
Byzantine Empire--Foreign relations--Catholic Church.
Catholic Church--Foreign relations--Byzantine Empire.
Giovanni, da Parma, d. 1283.