Meinhard is known to have taken part in the German Crusade of 1197 launched by the Hohenstaufen emperor Henry VI. He laid witness to the death of his friend, the Babenberg duke Frederick I of Austria with Bishop Wolfger of Passau, Count Eberhard of Dörnberg, Count Ulrich III of Eppan and Frederick's closest attendant on 16 April 1198 at Acre.