Columbia subject headings:
Harvard subject headings:
Catholic Church
Christian union
Council of Basel (1431-1449 : Basel, Switzerland)
Council of Florence (1438-1445 : Florence, Italy)
Intercultural communication--Religious aspects--Christianity
Orthodox Eastern Church
Princeton subject headings:
Catholic Church--Relations--Orthodox Eastern Church.
Christian union.
Council of Basel (1431-1449 : Basel, Switzerland)
Council of Florence (1438-1445 : Florence, Italy)
Intercultural communication--Religious aspects--Christianity.
Orthodox Eastern Church--Relations--Catholic Church.