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                                          Athanasius, St.
Personal 
      Played a prominent role in the theological struggle in the
  Council of Nicea (325)
Opposed Arius (256-336) who maintained that the Son was of
  a different substance from that of the Father, and was merely
  a creature
Formulated the "homousian doctrine" that the Son of God is the
  same essence of substance of the Father
Became bishop of Alexandria (328)
Place and dates
(Alexandria) 293-373
Writings
Discourses Against the Arians
History of the Arians
Apology Against the Arians
On the Decrees of the Nicene Synod
athanasius