 The writers say that they are willing to die defending Olsztyn Castle, Warmia, and Poland from the Teutonic Knights.Nicolas Copernicus is directly associated with Sigismund I of Poland in the wars against the Teutonic Order, the reform of royal mints and the minting of coins, in establishing modern market economy in 16th century Poland, in direct contacts with king's personal medical doctor, with Cracow (Kraków) and the Jagiellonian University, and with the Polish Roman Catholic Church in Cracow.Sikorski wrote "the intellectual adventure of my life were my discoveries of Copernicus’ Polish ancestry and nationality".