Cum ex apostolatus officio

{{Short description|1559 papal bull}}

{{Italic title}}

{{Infobox papal document|title=Cum ex apostolatus officio|type=bull|pope=Paul IV|language of title=latin|translation of title=By virtue of the Apostolic office|signature date=1559|Papal coats of arms=C o a Paulus IV.svg|subject=Measures against heretics|before=Cum nimis absurdum|after=Ad caritatis et misericordiae opera}}

{{Papal primacy and infallibility}}

Cum ex apostolatus officio is the name of a papal bull issued by Pope Paul IV in 1559; it states that only Catholics can be elected popes, to the exclusion of non-Catholics, including former Catholics who have become public and manifest heretics.{{Cite book|last=Bonora|first=Elena|url=https://books.openedition.org/efr/2823|title=Hétérodoxies croisées. Catholicismes pluriels entre France et Italie, XVIe-XVIIe siècles|date=2015|editor-last=Tallon|editor-first=Alain|chapter=Il sospetto d'eresia e i 'frati diplomatici' tra Cinque e Seicento|doi=10.4000/books.efr.2823|isbn=9782728311439 |editor-last2=Gigliola|editor-first2=Fragnito|chapter-url=https://books.openedition.org/efr/2834|via=OpenEdition Books}}