In 1364, he sponsored the Congress of Kraków, in which a number of monarchs participated, which was concerned with the promotion of peaceful cooperation and political balance in Central Europe.
Aastal 1364 võõrustas ta Krakówi kongressi, millel osalesid mitmed monarhid ning mis oli seotud rahumeelse koostöö ja poliitilise tasakaalu edendamisega Kesk-Euroopas.