Following the failure of the Council of Florence, the archbishop of Ephesus wrote prolifically about the potential union with the Western Latins and the doctrinal issues of compromise that presented themselves at the time.The Ecumenical Patriarch Joseph II was present at the Council, and a supporter of union with the Latins, his successor Gregory III was also closely tied with the Roman Curia, and would eventually flee to Rome in 1451. His work here is to contest the utility of Mark's theological (and perhaps political) claims, and attempt to establish his pro-Union perspective in the hopes of obtain papal military aide from the West.