Editing Pope Gelasius I (section)

== Acacian schism ==
{{Integralism |expanded=people}}
{{see| Acacian schism}}
The papal election of Gelasius on 1 March 492 was a gesture of continuity: Gelasius inherited the conflicts of [[Pope Felix III]] with [[Eastern Roman Emperor]] Anastasius and the [[patriarch of Constantinople]] and exacerbated them by insisting on the obliteration of the name of the deceased [[Patriarch Acacius of Constantinople]] from the [[diptych]]s,<ref>{{Cite EB1911|wstitle=Gelasius|display=Gelasius s.v. Gelasius II.|volume=11|page=554|first=Louis Marie Olivier|last=Duchesne|author-link=Louis Duchesne}}</ref> in spite of every ecumenical gesture offered by the contemporaneous Patriarch [[Euphemius of Constantinople|Euphemius]].

The split with the Emperor and the Patriarch of Constantinople was inevitable, from the Western view, because they considered the [[Monophysite]] view of [[Jesus Christ]] having only a Divine nature a [[heresy]]. Gelasius authored the book ''De duabus in Christo naturis'' (''On the dual nature of Christ''), which described [[Catholic theology|Catholic doctrine]] in the matter. Thus Gelasius, for all the conservative Latinity of his style of writing, was on the cusp of [[Late Antiquity]] and the [[Early Middle Ages]].<ref name="Ullman"/>

During the Acacian schism, Gelasius advocated the primacy of the [[See of Rome]] over the universal Church, both East and West, and he presented this doctrine in terms that became the model for successive popes, who also claimed [[papal supremacy]] because of their succession to the [[Supreme Pontiff|papacy]] from the first supreme pontiff, [[Peter the Apostle]].<ref name="ce-gelasius"/>

In 494, Gelasius authored the very influential letter ''[[Duo sunt]]'' to Anastasius on the subject of the relation of Church and state, which letter had political impact for more than a millennium:<ref name="Fordham">{{Cite web|title=Internet History Sourcebooks Project|url=https://sourcebooks.fordham.edu/source/gelasius1.asp|access-date=2020-08-20|website=sourcebooks.fordham.edu}}</ref> [[Pope Gregory XVI]] quoted from it in his letter to the [[Catholic Church in Switzerland|Swiss]] clergy, ''[[Commissum divinitus]]'' (17 May 1835), responding to the {{ill|Baden articles|de|Badener Artikel}}, which gave some of the [[Swiss cantons]] authority over church matters including the sacraments.<ref>Pope Gregory XVI, [https://www.papalencyclicals.net/greg16/g16commi.htm Commissum divinitus], paragraph 8, ''Papal Encyclicals Online'', accessed on 8 March 2025</ref>