 Urged by Pope Paul II , Matthias led a crusade against the Czech Hussites and occupied great parts of Moravia and Silesia in 1468 . The Catholic Estates of Moravia proclaimed him King of Bohemia on 3 May 1469 . Matthias ' reign was also recognized in Lusatia and Silesia , but Bohemia proper remained under the rule of his opponents , Kings George of Poděbrady ( till 1471 ) and Vladislaus II Jagiellon . Through a series of wars , Matthias occupied Lower Austria and Styria between 1480 and 1487 . He officially adopted the title of Duke of Austria in 1487 . 
