- Latin: semtus, the sixth
Reigned from 31 July 432 to 18 August 440. Born in Rome, Italy; died there on 18 August 440. During his pontificate he was falsely accused of favoring Nestorianism and Pelagianism, because of his conciliatory disposition during their controversies. He
- approved of the Acts of the Council of Ephesus
- defended the supremacy of the pope over Illyricum, against the local bishops and Proclus of Constantinople
- restored the Basilica of Liberius
- beautified Saint Peter’s, and the Lateran Basilica
Feast, 28 March.
- “Pope Saint Sixtus III”. . Saints.SQPN.com. 21 August 2013. Web. 13 December 2013. <>