St. Pius I
Pius, a native of Aquileia, was elected pope c.
140. He presided over the council that
excommunicated Marcion in 144; Pius also combatted gnosticism.
He is supposed to have been
the brother of the Shepherd of Hermas
and to have known Justin Martyr. Pius died c.
154 and is first mentioned as a martyr in the IX Century.