 For the regency and governorship of the Austrian hereditary lands, Charles named his brother Ferdinand Archduke in the Austrian lands under his authority at the Diet of Worms (1521).Charles also agreed to favor the election of Ferdinand as King of the Romans in Germany, which took place in 1531.Therefore, it is by virtue of the Worms agreement that Ferdinand became Holy Roman Emperor and obtained hereditary rights over Austria at the abdication of Charles in 1556.