Gregory Palamas
Gregory Palamas (; Byzantine Greek: Γρηγόριος Παλαμᾶς, romanized: Grēgórios Palamâs, pronounced [ɣriˈɣori.os palaˈmas]; c. 1296 – 14 November 1359) was a Byzantine Greek theologian and Eastern Orthodox cleric of the late Byzantine period. A monk of Mount Athos (modern Greece) and later archbishop of Thessalonica, he is famous for his defense of hesychast spirituality, the uncreated character of the light of the Transfiguration, and the distinction between God's essence and energies (i.e., the divine will, divine grace, etc.).