Introduction : from permeable circles to hardened boundaries
Ammonius Saccas and the philosophy without conflicts
Origen as a student of Ammonius
Plotinus, Porphyry, and philosophy in the public realm
Schism in the Ammonian community : Porphyry v. Iamblichus
Schism in the Ammonian community : Porphyry v. Methodius of Olympus
Conclusion : the Ammonian community and the great persecution.