198/211
Septimius and Caracalla 
     

199/217
St Zephyrinus

200/220 Tertullian writes against pagans, gnostics, and marcionists
202 Persecutions in North Africa. Clement leaves Alexandria.
203 Origen heads the Catechetical School of Alexandria
207/220 Montanistic writings of Tertullian
207 Tertullian is declared a montanist and writes “Against Marcion”

211/212
Caracalla and Geta
      

212/217
Caracalla 

215/219 Origen leaves Alexandria

217/218
Macrinus

217/222
St Callixtus I

218/222
Heliogabalus

Council of Carthage

222/235
Alexander Severus

222/230
St Urban I

225/230 Writings of Origen, leaves Alexandria for Caesarea

233/244 Plotino settles down in Alexandria

230/235
St Pontain

235/238
Maximinus Thrax

235/236
St Anterus

235 Persecution against the Christian leaders
236 Persecution in Capadocia

236/250
St Fabian

238
Gordianus I

238
Gordianus II

238
Balbinus and Pupienus
     

238/244
Gordianus III

244/246
Philip I

246/249
Philip I and Philip II
    

248 Antichristian massacre in Alexandria

249/251
Decius

251/253
St Cornelius

250/251 Cipriano flees Carthage
250 Persecution obliging Christians to adore the gods

251
Trebonianus Gallus

Cyprian presides over a council on the problem of lapses
251 Cyprian writes “The Unity of the Catholic Church.” Schism of Novatian.

251/252
Gallus and Hostilianus
    

252/253
Gallus and Volusianus
   

253
Aemilian

253/254
St Lucius I

254 Death of Origen

253/254
Valerian

254/260
Valerian and Gallienus

254/257
St. Stephen I

255/257 Controversy of Rebaptism

257/258
St Sixtus II

259/268
St Dionysius

260/268 
Gallienus

268
Marius

268/270
Claudius II

269/274
St Felix I

270/275
Aurelianus

275/283
St Eutychian

275/276
Tacitus

276
Florianus

276/282
Probus

283/284
Carinus

283/296
St Caius

284/285
Carinus and Diocletian
    

285/286
Diocletian

286/293
Diocletian and Maximianus
  

293/305
Maximianus and Constantius Chlorus
 

296/304
St Marcellinus