While some historians list the privilege of nihil novi as the culmination of the szlachta's empowerment process, others continue the list up to the end of the 16th century. Within this period, further privileges strengthening the nobles' position over the peasants came into effect when the sejm of 1520 in Bydgoszcz introduced laws that obliged peasants to provide labor to the nobles. It also gave the nobles unrestricted access to the Vistula river and reduced their vulnerability to city and towns' courts. The king, Zygmunt I of Poland, also promised to convene the Sejm every four years, and in either 1518 or 1521 (sources vary) the peasants lost the right to complain to the royal court.
