St Gregory Palamas

Saint Gregory Palamas (Γρηγόριος Παλαμάς) (1296 - 1359) was a monk of Mount Athos in Greece and later the Archbishop of Thessalonica known as a preeminent theologian of Hesychasm. He is venerated as a Saint in the Eastern Orthodox Church, as well as the Roman Catholic and Eastern Catholic Churches. Some of his writings are collected in the Philokalia. The second Sunday of the Great Lent is called the Sunday of Gregory Palamas in those Churches that commemorate him according to the Byzantine Rite. He also has a feast day on November 14.