sentences:  Duke Friedrich Ludwig became ill and died in 1681 at Schloss Landsberg (castle) near Obermoschel.Like Friedrich III of Veldenz before him, Friedrich Ludwig died without a male heir, and the new dynasty turned out to be the Swedish royal family, who were a branch of the late Duke's family.Thus, King Karl XI of Sweden was awarded the titles of Count Palatine of Zweibrücken and Duke of Bavaria.