The Sejm was convoked in September 1679, pre-Sejm Sejmiks held in November that year. Sejm sessions commenced in Grodno on December 15th 1679. Standard-bearer of Poznań Michał Skoroszewski was elected Speaker. The Sejm became an arena for discord between the court and the opposition, stemming from intrigue by Lithuanian magnates (Pac and Wiśniowiecki families) during the Swedish invasion of the Duchy of Prussia in the years 1678-1679, and from royal policies supporting Hungarian

The Sejm was convoked in September for December 6th 1547 (St. Nicholas’ Day). Pre-Sejm Sejmiks were held in November 1547. Sejm debates proceeded in the presence of both monarchs – Sigismund I the Old and Sigismund Augustus. The assembly focused on financial affairs tying in with state defence, upon explicit royal postulate. The King emphasised that matters of defence cannot be resolved by calling the levy en masse alone, as this is a measure for times of specific need and