He acted as one of the missi dominici, and spent some time at the court of Charlemagne, where he was known by the assembled scholars as Aquila, and his name appears as one of the signatories to the emperor's will.
He was one of the original co-signatories of the Holy Alliance, though, in common with most, he signed it with reluctance; and in the counsels of the Grand Alliance he allowed himself to be practically subordinated to Alexander and later to Metternich.
The United States government therefore proposed that the signatories should insert in the act of ratification a reservation to the effect that resort to the International Prize Court, in respect of decisions of their national tribunals, should take the form of a direct claim for compensation.
Secretary Knox also proposed that a further enabling clause be inserted providing that the International Court of Prize be competent to accept jurisdiction in all matters, arising between signatories, submitted to it, the Court to sit at fixed periods every year and to be composed according to the panel which was drawn up at the Hague.
While the signatories of the peace of Prague were making ready to assist the emperor the only Germans on the other side were found in the army under Bernhard of SaxeBernhard Weimar.