 As he was killed the next year, Władysław I proclaimed himself his successor, he nevertheless had to deal with the permanent pressure by the claimants of the Bohemian Přemyslid and Luxembourg dynasties, who had begun to vassalize the southwestern Silesian duchies.In 1320 Władysław I, against the fierce resistance of King John of Bohemia, reached the consent by Pope John XXII to have himself crowned Polish king at Kraków.The Duchy of Kraków was finally incorporated into the Lands of the Polish Crown as Kraków Voivodeship.