 the duchies of Styria, Carinthia and Carniola) and Duke Frederick IV became the ruler of Tyrol and Further Austria.The partitions decisively weakened the Habsburg position, in favour of their rivals from the Luxembourg and Wittelsbach dynasties.The Habsburg Albertinian line was again elevated to the Imperial throne, when in 1438 Duke Albert V of Austria was chosen King of the Romans as the successor to his House of Luxembourg father-in-law, Emperor Sigismund.