confiscated their goods. Tyrol stormed the Pass of Calliano and later besieged the castle at Rovereto using a massive bombard, one of the earliest times such a large piece had been used in warfare. The war continued through summer but ended with no decisive victory for either side. One notable casualty of the conflict was the condottiero Roberto Sanseverino d'Aragona. By 1490 the opposition of Tyrolean nobles compelled Sigismund to hand over the rulership to Frederick's son Archduke Maximilian I, who later succeeded his father as Holy Roman Emperor. Whether Sigismund voluntarily handed over power to Maximilian or was strongly coerced by the latter is not clear. With Sigismund's death in 1496, the Tyrolean branch of the Habsburg Leopoldian line became extinct, leaving Archduke Maximilian as sole heir to all the dynasty's possessions. See also Burgundy Wars Sigmundskron Castle References References External links Encyclopedia of Austria 1427 births 1496 deaths 15th-century archdukes of Austria People from Innsbruck Counts of Tyrol People temporarily excommunicated by the Catholic Church