Dominions of Sweden German principalities, the Swedish kings in their roles as princes and dukes, or "Reichsfürsten", of the Holy Roman Empire took part in the German diets from 1648 until the dissolution of the Holy Roman Empire in 1806. Following the Thirty Years' War, the Peace of Westphalia in 1648 assigned to Sweden the two bishoprics of Bremen-Verden, with the exclave of Wildeshausen. All of them were ceded to Hanover in the peace treaty of 1719. By the Peace of Westphalia in 1648 Sweden received Swedish Pomerania, situated along the German Baltic Sea coast. The whole Duchy of Pomerania was under Swedish
Treaty of Altranstädt (1707) Treaty of Altranstädt (1707) The Treaty or Convention of Altranstädt was signed between Charles XII of Sweden and Joseph I, Holy Roman Emperor on 31 August 1707. It settled the rights of Protestants in Silesia. While the Protestant Reformation had strongly affected Silesia, the Habsburg emperors had subjected the province to the counter-reformation in the 18th century. Especially in Upper Silesia, these measures were successful: in the early 18th century, almost half of the Silesian population was Roman Catholic and some 1,000 churches had been rededicated from Protestant to Roman Catholic. The Peace of Westphalia (1648) protected Protestants only in