Mark of Ephesus
Mark of Ephesus (Greek: Μᾶρκος ὁ Ἐφέσιος, born Manuel Eugenikos, also called Markos Eugenikos) was a hesychast theologian of the late Palaiologan period of the Byzantine Empire who became famous for his rejection of the Council of Ferrara–Florence (1438–1439). As a monk in Constantinople, Mark was a prolific hymnographer and a follower of Gregory Palamas' theological views.