This man fled a battle his troops eventually won under Schwerin at Mollwitz.
While living in Rheinsberg Castle, this ruler spent much of his time in correspondence with Voltaire, whom this man later invited to visit him in his Sanssouci Palace. This man fled a battle his troops eventually won under Schwerin at Mollwitz. That battle occurred after this ruler invaded Silesia in a breach of the Pragmatic Sanction. For 10 points, name this ruler who fought in both the War of the Austrian Succession and the Seven Years' War against Maria Theresa, a Hohenzollern who expanded the size and power of Prussia.
While living in Rheinsberg Castle, this ruler spent much of his time in correspondence with Voltaire, whom this man later invited to visit him in his Sanssouci Palace.
{Frederick} the {Great} [or {Frederick II} of Prussia; or {Friedrich der Grosse}; or {Friedrich II}; prompt on {Frederick};