Antipope Anacletus II seized Rome by the force of his supporters there, forcing the true pope, Innocent II, to flee. The true pope governed the Church in exile with the support of the majority of the Church. Upon the death of the antipope, the schismatics placed antipope Victor II in Rome, who quickly surrendered to Innocent II.
This history is vastly different from the various conjectures about Cardinal Siri, whose supposed situation closely resembles the events of the 1040's, related previously.