Pope Severinus was Pope two months, from 28 May until his death on 2 Aug. He became caught up in a power struggle with the Byzantine Emperor Heraclius over the ongoing Monothelite controversy.
During the short time he was pope, Severinus condemned the Ecthesis. Convening a synod, he decreed that “as there were two natures in Christ, so there were two natural operations.” He also renewed the mosaics in the apse of Saint Peter’s Basilica. Unfortunately Severinus was already quite old when his election was confirmed, and his reign was only two months long when he died on 2 August 640.
In the Liber Pontificalis, Severinus was described as a kind, generous and mild holy man, a benefactor to the clergy, and a friend to the poor.