At the end of 1411, Stibor, his brothers and other members of the Clan of Ostoja were in charge of leading troops to fight against the Republic of Venetia in Friuli. In 1412 Stibor was meeting with Zawisza Czarny (The Black Knight) in his Castle of Star* *ubov*a in Slovakia, preparing the negotiation between Sigismund and Polish King Vladislav Jogaila, which ended with the Treaty of Lubowla. Before his death, he set up a collegiate chapter for Augustinians in V*g*jhely (today Nov* Mesto nad V*hom in Slovakia).
Sigismund
Vladislav Jogaila