Martin I has meanwhile been kept in exile in the Crimea, where he will die in September 655.
Little is known about what happened in Rome after Pope Martin's departure, but it is typical in these days for the Holy See to be governed by the archpriest and archdeacon.
After a year and two months, a successor is found to Martin in Eugene, who succeeds on August 10, 654, as the seventy-fifth pope of the Catholic Church.
Little is known of Eugene's early life other than that he was a Roman from the Aventine and was known for his holiness, gentleness, and charity.
He had been a cleric from his youth and held various positions within the Church of Rome.
On the banishment of Pope Martin I by Constans II, he had shown greater deference than his predecessor to the emperor's wishes; he makes no public stand against the Monothelitist creed of the patriarchs of Constantinople.