Demetrian served in a monastery dedicated to Saint Anthony, and he was eventually ordained as that institution's abbot, or "hegoumenos", a position he is said to have held for forty years.
Demetrian served in a monastery. This monastery was dedicated to Saint Anthony. He was eventually ordained as that institution's abbot ". He is said to have held for forty years. This was as that institution's abbot" was a position. He was "hegoumenos". This was what he is said to have held for forty years.