Isidore of Pelusium

Isidore of Pelusium, who lived from about 370 to 450, was born in Egypt to a prominent Alexandrian family. He became an ascetic and moved to a mountain near the city of Pelusium, in the tradition of the Desert Fathers. He is known chiefly through his letters, addressed to figures including Cyril of Alexandria and the emperor Theodosius II; a collection of about two thousand of his letters, mostly brief, was assembled in antiquity at the Sleepless monastery in Constantinople and preserved in numbered order across a number of manuscripts, with further unpublished letters surviving in Syriac translation. Some of the letters are valued for their interest to the exegesis of the Greek Bible. He is venerated as a saint, with his feast day on February 4.