Antipope Adalbert

It also issued a summons to the "schismatics", the followers of Gregory's successor, Urban II, enjoining them to be present in Rome on 1 November.[3] The Annales Romani, the richest source of information on Adalbert's pontificate, states simply that he was elected by that part of the clergy and people of Rome who had sided with Clement III.The situation eventually got so bad that he was forced to take refuge in the basilica of San Marcello al Corso under the protection of Romano and Giovanni Oddoline.The Annales Romani and the biography of Paschal in the Liber pontificalis agree that the acceptance of the bribe and the antipope's imprisonment took place in the space of one day.[2] In 1105, the pro-Imperial party elected Maginulf as Sylvester IV in opposition to Paschal, but he was no more successful than his predecessors for he too lacked imperial support.
Paschal IIAntipapalTheodoricSylvester IVCardinalRoman Catholic ChurchBishop of Silva CandidaAtellaCatholic ChurchantipopeClement IIIsuburbicarian diocese of Silva CandidaLateran Palacepapal letterpontificateconciliabulumheresiesGregory VIIUrban IIelectionSanti ApostoliFrutolf of MichelsbergEkkehard of AuraHenry IVAnnales RomanienthronedpalliumSaint Peter's tombSan Marcello al CorsoLiber pontificalisBenedictineAversaMiranda, SalvadorFlorida International UniversityAntipopesNataliusHippolytusNovatianHeracliusFelix IIUrsicinusEulaliusLaurentiusDioscorusTheodorePaschalConstantine IIPhilipJohn VIIIAnastasius IIIChristopherBoniface VIIJohn XVIGregory VIBenedict XHonorius IIGregory VIIICelestine IIAnacletus IIVictor IV (1138)Victor IV (1159–1164)Paschal IIICallixtus IIIInnocent IIINicholas VWestern SchismAvignonClement VIIBenedict XIIIClement VIIIBenedict XIVAlexander VJohn XXIIIFelix VPalmarianGregory XVIIPeter IIGregory XVIIIPeter IIIApostles of Infinite LoveClement XVConclavist/post-SedevacantistMichael IPius XIIIMichael II