Sejm was convened by a resolution adopted at the congress in Jędrzejów, which took place in the period of 18-28 January 1576, after the election sejm in 1575, during which the double election of princess Anna Jagiellon and Transilvanian voivode Stephen, who was appointed as her future husband, and the emperor Maximilian, were performed. The supporters of the Anna and Stephen choice gathered in Jędrzejów, set the date of the coronation sejm to 4 March 1576, what turned out to