In January of 897 Pope Stephen VI ordered that the body of his predecessor Pope Formosus be exhumed from its grave.
Formosus had been dead for nine months.
Stephen had the corpse dressed in papal vestments, propped up in a chair, and placed on trial before a church court. A deacon was assigned to speak on behalf of the dead man since Formosus could not speak for himself.
Stephen himself reportedly shouted accusations at the corpse and at one point demanded to know why Formosus had usurped the papacy when he had no right to it.
This event is called the Cadaver Synod. It is real. It is documented. And it is one of the most extraordinary things that has ever happened in the history of organized religion.
What Was Actually Going On
The Cadaver Synod was not pure madness. It was politics dressed up as theology, which is not unusual in the history of the church.
Pope Formosus had been involved in a series of political conflicts between competing noble factions that were fighting for control of the papacy and the Italian states around Rome. He had crowned a particular claimant as Holy Roman Emperor. Stephen VI was aligned with a different faction that wanted that coronation invalidated and that wanted to retroactively delegitimize Formosus's actions.
By convicting Formosus of crimes posthumously Stephen could invalidate every ordination and act Formosus had performed during his papacy. This had enormous practical political consequences for the factions involved.
The trial proceeded. The corpse was found guilty. The three fingers on Formosus's right hand that he had used for ordinations were cut off. The body was stripped of its vestments, dressed in regular clothes, and thrown into the Tiber River.
What Happened Next
The Cadaver Synod did not end well for Stephen VI.
The Roman populace was outraged by what had happened. A popular uprising seized Stephen, removed him from the papacy, and threw him in prison. He was strangled in his cell a few months later.
His successors reversed the Cadaver Synod. The body of Formosus was retrieved from the Tiber and reburied with honor. The convictions were annulled. The ordinations were declared valid.
All of that accomplished nothing politically because the underlying power struggle between the factions continued for years afterward.
What This Story Tells Us
The Cadaver Synod is extreme. The image of a sitting pope shouting accusations at a dressed-up corpse is extraordinary. But what it describes is not extreme at all by historical standards.
It is an institution using every tool available to it, including the most bizarre and theatrical ones, to serve the political interests of the faction that currently controlled it.
Using religious authority and religious proceedings to settle political scores is one of the oldest patterns in the history of institutions. The Cadaver Synod is just the most dramatic example you will ever find.
It is also a reminder that the closer you look at history the stranger it gets. Most people know that medieval church politics were complicated and sometimes violent. Almost nobody knows that one pope put a dead pope on trial and screamed at the body.
Now you know.
Robert Lee Beers III is a writer and digital preservation advocate based in North Charleston South Carolina.