The purpose of this article is to present the political thought of Paul Wladimiri, a representative of the Polish school of international law, which was found at the University of Cracow in the 15th century. The first part of the text describes the historical context of Vladimiri’s work, primarily his diplomatic activity during the war between Poland and the Teutonic Order. In the second part I will discuss Vladimiri’s theory of just war, and in the third part ‒ his concept of natural law.