From Throne to Monastery
Joasaph ruled Thessaly only briefly, from about 1370 to about 1373, holding the title emperor of the Serbs and Greeks though his authority extended only over that region. Rather than retain temporal power, he handed the government to his kinsman Alexios Angelos Philanthropenos and entered the monastic community that his father had supported at Meteora. He is documented under his monastic name Joasaph by 1381.
He joined the Great Meteoron, the monastery established on the great rock by Saint Athanasios, becoming his disciple. His sister, Maria Angelina, was a major benefactress of the monastery, and the two together provided for its building and adornment.