While the emperor Valentinian governed in peace, and interfered with no sect, Damasus after Liberius undertook the administration of the bishopric at Rome; whereupon a great disturbance was caused on the following account. A certain Ursinus, a deacon of that church, had been nominated among others when the election of a bishop took place; as Damasus was preferred, this Ursinus, unable to bear the disappointment of his hopes, held schismatic assemblies apart from the church, and even induced certain bishops of little distinction to ordain him in secret. This ordination was made, not in a church,
Christianity · Church History · Ecclesiastical History
Book IV, Ch. 29 — Damasus ordained Bishop of Rome. Sedition and Loss of Life caused by the Rivalry of Ursinus.
Ecclesiastical History · Socrates Scholasticus