Historical Events in 1386 Feb 15 Duke Philip the Stout forms Council of Flanders Mar 4 Władysław II Jagiełło (Jogaila) crowned King of Poland May 9 Treaty of Windsor between Portugal and England (oldest diplomatic alliance in the world still in force) Jul 9 Battle at Sempach: Swiss beat duke Leopold III of Austria Oct 18 Opening of the University of Heidelberg Famous People Born in 1386 Sep 16 Ambrose Traversari, Italian theologian and monk, born in Portico di Romagna, Forlì, Papal States (d. 1439) Famous People Who Died in 1386 Jul 9 Leopold III, Duke of Austria (1365-68), dies at 34 1385 History by Year 1387