Archbishop Janisław (d. 1341) was an important 14th-century public figure. After his enthronement in the episcopal see at Gniezno in 1317 he took active part in Poland's political life. Like his predecessors he put the church firmly behind all the efforts to consolidate the Polish state and to reintroduce its control over territories that had
fallen away since 1138, the age of feudal fragmentation. Janisław was instrumental in the coronation of Władysław the Short (Łokietek) in 1320, which marked the success
of Poland's unification, and backed the new king's policies aimed at regaining the lands taken over by the Teutonic Knights. Janisław was not only a trusted advisor of
Władysław Łokietek and close collaborator (as member of the Privy Council and Constable of Wielkopolska and Kujawy) of Kazimierz the Great but also had the ear
of Pope John XXII, who did not hesitate to entrust him with various sensitive jobs. Janisław served as judge and mediator in a number of judicial proceedings involving
both ecclesiastical and political interests such as the dispute between Poland and the State of the Teutonic Knights, the suit of Teutonic Knights against the Order of St John, the dispute between Maciej Bishop of Włocławek and the Order of the Teutonic Knights, and the conflict between Jan Grot Bishop of Cracow and King Władysław the Short in 1329. Janislaw’s jurisdiction as Collector of St Peter's Pence extended to the County of Chełm and Pomerania (Gdańsk). He used this fact to bolster the Polish claims in the dispute between Poland and the Order of the Teutonic Knights.