 Looking for allies during the great European conflict between Pope John XXII and Ludwig Wittelsbach (Louis of Bavaria), Władysław the Short sided with the papal camp.Władysław's alliance with the Charles I Robert, king of Hungary, was strengthened in 1320 by Charles I Robert's marriage to Wladyslaw's daughter Elizabeth Łokietkówną.Three years later, the Polish-Hungarian alliance proved itself in Rus' Galicia.