Severinus was pope in the year 640. A Roman and the son of one Abienus, Severinus was elected on the third day after the death of his predecessor, and envoys were at once sent to Constantinople, to obtain the confirmation of his election in October 638. But the Emperor, instead of granting the confirmation, ordered Severinus to sign his Ecthesis, a Monothelite profession of faith. When Severinus refused, he was kept out of the Papal See for almost two years. He died soon afterwards, however.

Preceded by:
Pope Honorius I
List of popes Succeeded by:
Pope John IV