Venerable Nicodemus of Mt. Athos, spiritual writer (1809)
He is best known for his collections of Orthodox writings, most importantly the Philokalia, a five-volume compendium of writings on asceticism and prayer, especially the Jesus Prayer, by the holy Fathers of the Church. (The first four volumes have been translated into English). He produced an Orthodox edition of Unseen Warfare, originally by Lorenzo Scupoli, a Roman Catholic. (This was further revised by St Theophan the Recluse). He also edited the Pedalion (Rudder), a collection of the canons of the Orthodox Church with his commentary.
Note: The English edition of the Rudder needs to be read with care, since it includes additional comments by the translator, not clearly distinguished from those of the Saint.