On 16 September, Barbarossa stipulated that the dukes of Austria were to support the Holy Roman emperors during a war against Hungary in his charter by which he elevated Austria to a duchy, showing that the relationship between Hungary and the Holy Roman Empire was still tense.
Pada tanggal 16 September, Barbarossa menetapkan bahwa para adipati Austria mendukung kaisar-kaisar Romawi Suci dalam perang melawan Hongaria di dalam piagamnya dimana ia mengangkat Austria ke sebuah kadipaten, yang menunjukkan bahwa hubungan antara Hongaria dan Kekaisaran Romawi Suci masih tegang.