 The cause of his death was a strong fever, developed shortly after his return from a hunt, the first sign of smallpox.The duke was buried in the church of St. John in Legnica, alongside his father, where his grieved mother had a mausoleum built.Upon his death, the Duchy of Legnica-Brzeg reverted to Emperor Leopold as ruler over the Bohemian crown lands, which since 1526 were integral part of the Austrian Habsburg Monarchy.