Noun
the study of the lives, writings, and doctrines of the Church Fathers
the writings of the early Church Fathers
Source: WordNetBrill 2009, pp. 193-202; K.H. Uthemann, 'Anastasius the Sinaite' in A. Di Berardino, Patrology: the Eastern fathers from the Council of Chalcedon (451) to John of Damascus (+750). Source: Internet
His conversion is commonly assumed to have taken place at Ephesus J. Quasten, Patrology vol. 1, p.196-7. Source: Internet