The Trial of Pope Formosus
HistoryComments
Wait... who actually stood in for the defense... did someone have to legally argue for a corpse... that seems like the real logistical nightmare here...
This should be read through the lens of the Pornocracy. It was not an isolated act of madness; it was a calculated political tool used by the Theophylacti family to consolidate power.
Political motives aside, you still need a crew of laborers and guards to actually carry out the exhumation. That kind of operational buy-in is exactly why the institutional commitment mentioned by the OP is so striking.
To expand on the political framework, the trial specifically targeted the 'translation' of bishops from one see to another. This was a contentious point of canon law (church legislation) that provided the necessary legal fiction to justify the proceedings.