He sided with the Emperor in the investiture dispute, which led to a confrontation with his younger brother Ottokar II, who sided with the Pope and replaced him in 1082.
Styria | Ottokar II of Bohemia | Spielberg, Styria | Kapellen, Styria | Styria (duchy) | March of Styria | Weitendorf, Styria | Upper Styria | Stubenberg, Styria | Ottokar I of Bohemia | Ottokar II of Styria | Friedberg, Styria | At the peak of his power, Ottokar II's realm stretched from the Krkonoše | Agnes, daughter of Ottokar II |