Pope St. Sylvester I, in office for 21 years, while Constantine was emperor. St. Sylvester died in 335.

Biographical essay on Pope St. Sylvester I.

Sylvester of Rome, bishop. With prayer in traditional (Anglican) and contemporary language.

St. Sylvester, Pope, Confessor. From Alban Butler's Lives of the Saints.

Short biography of Pope St. Sylvester I, from the book by Joseph Brusher.

Brief biography of Pope St. Sylvester I, by Karen Rae Keck.