Horsiesius was a 4th-century Egyptian monk who held leadership roles within the Pachomian monastic system. He served as the head of the Koinonia during two distinct periods, first from 346 to 350 and later from 368 until his death around 387. Before the passing of Pachomius the Great, he acted as the superior of the Sheneset Monastery. His leadership helped guide the community through various transitions following the death of its founder.
Monastic leadership
After the death of Pachomius, Petronius appointed Horsiesius to lead the Koinonia. He held this position until 350, when he stepped down to be succeeded by Theodorus of Tabennese. Following the death of Theodorus in 368, Horsiesius returned to the role of superior, maintaining his authority over the community until his passing.
Written works
The most prominent work attributed to him is the Testament of Horsiesius. This text was translated into Latin by Jerome in 404. Additionally, several Coptic writings are linked to him, including four letters and seven catecheses. His testament has also been translated into English in modern times.
Veneration
Horsiesius is recognized as a saint within the Coptic Orthodox Church. His legacy continues through his monastic writings, which have been preserved and translated across different languages and centuries.