King and his administration. In addition, the Duchy was only the eastern bulk of the region of Prussia; the westernmost fragment constituted the part of Royal Prussia east of Vistula, held along with the title King of Prussia by the King of Poland. On 17 January 1701, Frederick dedicated the royal coat of arms, the Prussian black eagle with the motto "suum cuique" imprinted. On 18 January, he crowned himself and his wife Sophie Charlotte in a baroque ceremony in Königsberg Castle. Frederick's move was controversial, and only became widely accepted after the Treaty of Utrecht in 1713. Throughout the 18th century, the Hohenzollerns increased their power. They were victorious over the Austrian Habsburg monarchy in the three Silesian Wars, greatly increasing their power through the acquisition of Silesia. King Frederick II adopted the title King of Prussia in 1772, the same year he annexed most of Royal Prussia in the First Partition of Poland. The Hohenzollerns continued to be both Kings of Prussia and Electors of Brandenburg until the empire's dissolution in 1806. At that point, the entire realm was formally unified as the Kingdom of Prussia, with Brandenburg one of its provinces and Berlin the kingdom's capital, though the two parts later became again partially distinct during the existence of the German Confederation (1815-1866). See also List of monarchs of Prussia References 1701 establishments in Prussia 1772 disestablishments History of Prussia Monarchy in Germany