On October 6, 1806, the Assembly of Notables issued a proclamation to all the Jewish communities of Europe, inviting them to send delegates to the sanhedrin, to convene on October 20. This proclamation, written in Hebrew, French, German, and Italian, speaks in extravagant terms of the importance of this revived institution and of the greatness of its imperial protector. While the action of Napoleon aroused in many Jews of Germany the hope that, influenced by it, their governments also would grant them the rights of citizenship, others looked upon it as a political contrivance. When in the war against Prussia (1806-7) the emperor invaded Poland and the Jews rendered great services to his army, he remarked, laughing, "The sanhedrin is at least useful to me." David Friedländer and his friends in Berlin described it as a spectacle that Napoleon offered to the Parisians."