Anti-Pope (Guibert, archbishop of Ravenna), was chosen pope at the Synod of Brixen in 1080, by the party of the Emperor Henry IV, with the view of supplanting Gregory VII. After being repeatedly placed in the Roman see by violence, and expelled from it by the same means, he submitted to Paschal II in 1099, and died in the following year. — Neander, Ch. Hist. 4, 118 sq.; Gieseler, Ch. Hist. per. 3. div. 3. chap. 1, § 47, 48.