LTReikšminiai žodžiai: Zigmantas Vaza, 1566-1632 (Zygmunt III Vaza; Sigismund); Vladislovas Vaza; Lietuvos Didžioji Kunigaikštystė (LDK; Grand Duchy of Lithuania; GDL); Liublino unija, 1569 (Union of Lublin); Lenkija (Lenkijos karalystė. Kingdom of Poland. Poland); Abiejų Tautų Respublika (ATR; Rzeczpospolita Obojga Narodów; Žečpospolita; Sandrauga; Polish-Lithuanian Commonwealth); Abiejų Tautų Respublika (ATR; Rzeczpospolita Obojga Narodów; Žečpospolita; Sandrauga; Polish-Lithuanian Commonwealth); Zygmunt Vaza; Władysław Vaza; Union in Lublin; Polish Crown; The Republic of the Two Nations.
ENThe election of Sigismund Vasa took place on 19 August, 1587, his coronation on 27 December, and one month later, on 27 January 1588, the Grand Duchy of Lithuania, which did not participate in the election, recognised him as its ruler. When he ascended the throne, the process of shaping the Commonwealth was drawing to a close. There was a principle of election established partly, as became obvious who is entitled to attend, but the ways of election was not fully decided on. There was the relationship between the king and his subject defined, as well as internal relations between the Polish nobility of different faith. The frequency of session of the Sejm was known and there was a partial reform of the judicature carried out through establishment of the Tribunals. In that case the change was different, as the former ones confined in the frames of noble society of one Republic, and now there were two Tribunals: the Crown and Lithuanian. It should be stressed that the Polish-Lithuanian Commonwealth was not created from the beginnings, but only by the changes and complementation to what needed a change. The inferences were avoided where the practices were defined by custom, as it was in the case of the Sejm sessions. Some of the solutions were forced by the need arisen, so - as it was thought - they were to be used only once and was not given the written form. This was the case of the royal election and the rules were never to be changed. During the reign of Sigismund Vasa (1587-1632) there were the changes made in the legal and treasury systems of the Republic. In the times of his son and successor Ladislaus IV (1632-1648) the changes were made in the army. Over sixty years of their rule witnessed the most glorious victories of the Commonwealth: at Kircholm (1605) and at Khiszyn (1610). [...].