 In the Saxon Rebellion of 1073–75, Thimo fought against King Henry IV and also quarreled with his brother Bishop Frederick of Münster.Later he again approached the king and in 1088 attended the "Hoftag" diet in Quedlinburg, where the Brunonid margrave Egbert II of Meissen was deposed.The exact year of Thimo's death is unclear; since his son Conrad was born in approximately 1098, Thimo cannot have died long before this year.