Philotheus I of Constantinople

Philotheos Kokkinos was the Ecumenical Patriarch of Constantinople for two periods from August 1353 to December 1354 and from 8 October 1364 to August 1376, and a leader of the Byzantine monastic and religious revival in the 14th century. His numerous theological, liturgical, and canonical works received wide circulation not only in Byzantium but throughout the Slavic Orthodox world.