Pope St. Cornelius, had to contend with the antipope Novatian. When persecution broke out, Cornelius was exiled, and he died a martyr in 253.

Biographical portrait of Pope St. Cornelius.

Profile of Pope St. Cornelius. With links.

Account of the pontificate of St. Cornelius.

Short biography of Pope St. Cornelius, by Karen Rae Keck.