At the end of the 80s of the 16th century, a new change occurred at the top level in Rzeczpospolita. The new king, Sigismund III Waza, a Swedish prince, became king of Poland in 1587. He faced the political realities established here with the union of Lublin in 1567. At the time of ascending the throne, each king had to accept the conditions established back in the moment when Henric Valois ascended the throne. Thus, the plans he had regarding a new administration, Sigismund III had to take into account these realities in which the main role belonged to the Seim. This duality of power will be reinforced by Zebrzydowski’s rokosz. The Polish political system will be of great importance in the unfolding of events in central and eastern Europe, including Moldova.
