Marriage and Early Asceticism
According to his life, Ammon was raised in Christian piety and was pressed into marriage by his parents at around the age of twenty. By agreement with his wife he preserved his virginity, and the couple lived together as brother and sister rather than as husband and wife.
Sources record that they pursued asceticism jointly in fasting, prayer, and shared labor for an extended period. The OCA synaxarion gives this span as roughly twenty years, while other accounts place it at about eighteen years before the two parted by mutual consent. After the separation, Ammon is said to have visited his former wife twice each year.
Founder of Nitrian Monasticism
Following the separation, Ammon relocated to the Nitrian Desert south of Lake Mareotis (Mareotis), some fifty kilometers south of Alexandria. There he is credited with founding the monastic site of Nitria around 325 to 330, transforming the region's scattered hermits into an organized monastic community. Nitria became one of the earliest Christian monastic sites in Egypt and the first of the three major centers of monastic activity in Lower Egypt, alongside Kellia and Scetis.
Ammon worked in close collaboration with Anthony the Great, who provided spiritual guidance for his foundations. By tradition Ammon founded Kellia (the Cells) in 338 under Anthony's direction. According to the Apophthegmata Patrum (the Sayings of the Desert Fathers), Ammon approached Anthony because Nitria had grown too crowded for monks seeking a more solitary life; the two shared a meal, then walked into the desert until sunset, praying and planting a cross to mark the site of the new settlement roughly nineteen kilometers from Nitria.
Kellia was conceived as an advanced settlement for monks who had already mastered desert life at Nitria. Its cells were spaced far enough apart that no monk could see or hear another, the brethren gathering only on Saturdays and Sundays for communal meals and worship. These communities grew rapidly: by the 380s and 390s, visitors such as Jerome and Palladius of Galatia recorded populations of several thousand at Nitria and up to six hundred monks at Kellia.
Repose and Legacy
Ammon reposed around 356, at approximately sixty-two years of age. Anthony the Great outlived him and, according to tradition, witnessed Ammon's soul being borne up to heaven by angels at the moment of his death.
A substantial ascetic literature is attributed to Ammon in the manuscript tradition, including a body of ascetic Rules preserved in Greek, a set of Ascetic Institutions, a collection of letters preserved in the Patrologia Orientalis, and a work of counsel to novices. He is venerated across the Eastern Orthodox, Catholic, and Anglican traditions.
