The Grunwald Swords (, ) were a mocking "gift" sent by Ulrich von Jungingen, the Grand Master of the Order of Teutonic Knights, to King Władysław II Jagiełło of Poland and Grand Duke Vytautas of Lithuania on 15 July 1410, just before the Battle of Grunwald (Tannenberg). The gift, a pair of simple bare swords, was a symbolic invitation to engage Jungingen's forces in battle. After the Polish–Lithuanian victory, both swords were taken as a war trophy by King Władysław II to Kraków, Poland's capital at the time, and placed in the treasury of the Royal Wawel Castle.