Original: Eusebius of Caesarea counted 250 , Athanasius of Alexandria counted 318 , Ad Afros Epistola Synodica 2 and Eustathius of Antioch counted 270Theodoret H.E. 1.7 ( all three were present at the council ) .
Simplified: Eusebius_of_Caesarea counted 250 , Athanasius_of_Alexandria counted 318 , Ad Afros Epistola Synodica 2 and Eustathius_of_Antioch counted 270Theodoret H.E. 1.7 ( all three were present at the council ) .