Chapman, John. Studies on the Early Papacy. Port Washington, NY: Kennikat Press, 1971. . Fortescue, Adrian, and Scott M. P. Reid. The Early Papacy: To the Synod of Chalcedon in 451. Southampton: Saint Austin Press, 1997. . Jowett, George F. The Drama of the Lost Disciples. London: Covenant Pub. Co, 1968. Loomis, Louise Ropes. The Book of Popes (Liber Pontificalis). Merchantville, NJ: Evolution Publishing. . External links Image of Pope Saint Sixtus as seen on a fresco at Chalivoy-Milon in the Berry. Collected works in Migne Patrologia Latina 42 births 124 deaths 2nd-century archbishops 2nd-century Christian saints 2nd-century Romans Italian popes Italian saints Papal saints Clergy from Rome Popes Year of birth unknown 2nd-century popes