Edict by Władysław the Short in 1325 confirming the Cistercians of Byszewo continue to have the same rights as under German law, and the continued ownership of their Abbey in Byszewo.
In 1138, the Kingdom of Poland, which had been growing in strength under the rule of the Piast dynasty, encountered an obstacle which impeded its development for nearly two hundred years. In the will of King Bolesław III Wrymouth (Bolesław III Krzywousty), Poland was divided into five provinces: Silesia, Mazovia with eastern Kuyavia, Greater Poland, the Sandomierz Region, and the Seniorate Province. The Seniorate Province initially comprised Kraków and western Lesser Poland, eastern Greater Poland including Gniezno and Kalisz, western Kuyavia, Łęczyca and Sieradz (maintained by the Dowager Duchess Salomea of Berg for her lifetime), and with Pomerelia as a fiefdom. To prevent his four sons from quarreling, Bolesław granted one province to each of them, while the Seniorate Province was to be given to the eldest brother on the grounds of primogeniture. This decision was meant to forestall dynastic feuds and prevent the disintegration of the kingdom. However, it proved inadequate, and began nearly two centuries of what it had sought to counteract – constant fighting and disorder. Władysław I succeeded in re-uniting most of these lands back into the kingdom of Poland.