[Thorin]

>>>>St. Hippolytus (excommunicated as an anti-Pope), St. Athanasius, St. Joan of Arc (burned as a heretic). I believe St. John Chrysostom was also excommunicated at least once before he became the great Archbishop of Constantinople.

Thanks for the information. Were any of these excommunicated as the result of the actions of the Pope?

[Tantumergo]

"Were any of these excommunicated as the result of the actions of the Pope?"

Yes St. Hippolytus was. Both he and Pope St. Callistus ended up being exiled to the same place by the emperor. Eventually both their bodies were returned to Rome and both became venerated as Saints.

It is supposedly Hippolytus's fault that we now have Eucharistic Prayer II, but I think that's a heavy charge to lay on any single man - even a Saint.