Barlaam of Calabria
clergyman who converted to Eastern Orthodoxy
in the 14th century. He brought an accusation of heresy against Gregory Palamas
for the latter's hesychast
prayer. Three Orthodox Christian
synods ruled against him and in Palamas's favor. In contrast to Gregory Palamas's teaching that the "glory of God" revealed in various episodes of Jewish and Christian Scripture was the uncreated Energies of God
, Barlaam held that they were created effects as no part of God, whatsoever, could be viewed by humans. Upon the synodical decisions against him, he left Constantinople
permanently and presumably returned to Calabria and Roman Catholicism.