18th March » Emperor Alexander Severus and his mother Julia Avita Mamaea e.g Julia Mamaea are murdered by Roman legionary e.g legionaries near Mogontiacum (modern Mainz), ending the Severan dynasty.
20th March » Maximinus Thrax is proclaimed emperor. He is the first foreigner to hold the Roman throne.
28th September » Pope Pontian resigns. He and Hippolytus (writer) Hippolytus, church leader of Ancient Rome Rome, are exiled to the mining mines of Sardinia.
21st November » Pope Anterus succeeds Pope Pontian e.g Pontian as the nineteenth pope. During the persecutions of emperor Maximinus Thrax he is martyred.