 Nevertheless, Conrad definitely built his seat by the end of Béla's reign.However, soon, Conrad turned against Béla IV, according to the above-mentioned royal charter issued in 1263, which suggests he defected to Ottokar II of Bohemia, after his army vanquished the Hungarian troops in the Battle of Kressenbrunn on 12 June 1260.The document narrates Conrad invited and garrisoned Ottokar's Styrian soldiers in his fort at Óvár, and made plundering raids against the nearby villages and estates in Moson County.