In the spring and early summer of 1450, King Casimir Jagiellon travelled across Wide Greater Poland (Poznań and Kalisz voivodeships, Kujawa, Łęczyca, Sieradz, and Dobrzyń). This was the monarch’s first visit to this area after the journey he made following his coronation in 1447. In 1450, during the King’s stay in Koło, a provincial assembly of the nobility of Wide Greater Poland took place with his participation on 11–15 June. King Casimir’s mother, the Queen-Dowager Zofia Holszańska, also participated. In addition to her, several dozen other participants in this event have been identified: high-ranking officials from Wide Greater Poland, government officials, court officials, representatives of the episcopate, middle and low-ranking territorial officials, delegates of chapters, and representatives of the rank and file of the nobility. The Koło assemblies appeared in the political life of late medieval Poland after the death of King Wladislaus Jagiełło in 1434. According to current knowledge, the first one was held in 1436. Sources confirm their convening until 1447. Their functioning was also accepted by Casimir Jagiellon. However, the congress of 1450 was the first one he attended in person. In the later period, he attended Koło assemblies relatively often, and they became an important element of parliamentary and political life during his long reign (1447–1492).
In the spring and early summer of 1450, King Casimir Jagiellon travelled across Wide Greater Poland (Poznań and Kalisz voivodeships, Kujawa, Łęczyca, Sieradz, and Dobrzyń). This was the monarch’s first visit to this area after the journey he made following his coronation in 1447. In 1450, during the King’s stay in Koło, a provincial assembly of the nobility of Wide Greater Poland took place with his participation on 11–15 June. King Casimir’s mother, the Queen-Dowager Zofia Holszańska, also participated. In addition to her, several dozen other participants in this event have been identified: high-ranking officials from Wide Greater Poland, government officials, court officials, representatives of the episcopate, middle and low-ranking territorial officials, delegates of chapters, and representatives of the rank and file of the nobility. The Koło assemblies appeared in the political life of late medieval Poland after the death of King Wladislaus Jagiełło in 1434. According to current knowledge, the first one was held in 1436. Sources confirm their convening until 1447. Their functioning was also accepted by Casimir Jagiellon. However, the congress of 1450 was the first one he attended in person. In the later period, he attended Koło assemblies relatively often, and they became an important element of parliamentary and political life during his long reign (1447–1492).
 
