 His grandson Duke Maximilian Joseph in Bavaria purchased Possenhofen Castle on Lake Starnberg which became his major residence and where his children, notably the later Empress Elisabeth of Austria, Queen of Hungary ("Sisi"), were brought up.In 1838 he acquired Unterwittelsbach Castle (today housing a "Sisi" museum) near the site of Burg Wittelsbach, the ancestral seat of the House of Wittelsbach.His wife, Princess Ludovika of Bavaria, daughter of King Maximilian I Joseph of Bavaria, inherited the Upper Bavarian Tegernsee Abbey, purchased in 1817 by king Maximilian I Joseph, together with the nearby bath house at Kreuth.