Sep 22 Boniface II begins his reign as Catholic Pope Sep 22 Discorus begins his reign as Catholic anti-Pope Sep 22 St Felix IV reign as Catholic Pope ends Oct 14 Discorus ends his reign as Catholic anti-Pope Dec 15 Eastern Roman Emperor Justinian appoints a commission to codify the works of classical jurists (the Digest published 533) 529 AD Historical Events by Year 531 AD Medieval Popes Gregory I Gregory XIII Julius II Julius III Leo X Pius V
Gregory I
Gregory XIII
Julius II
Julius III
Leo X
Pius V